1. Free Rgb To Ral Colour Converter

Amazon.com: Razer DeathAdder Essential - Optical eSports Ergonomic Professional-Grade Gaming Mouse - 6,400 Adjustible DPI: Computers & Accessories. RGB / CMYK Converter is a tool to convert RGB or CMYK colors to PANTONE, RAL and HKS spot colors combined with a very nice user interface. Slide the Color Panel.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, and XML.

Product names and collections mentioned in this page may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. This page color simulations only approximate the real color cards, fandecks or color collections, they can NOT perfectly represent or substitute the original colors. All the color data and color simulations in this page relates to physical measures of the original color samples taken in our lab. They have not been copied or derived from public or proprietary data so they surely differ when compared with other sources or their respective companies specifications.

As a painter and professor of art - I constantly come across references that optical colour mixing, as in the art movement 'pointillism' as well as ink jet printing involves both subtractive and additive mixing in the eye of the viewer. I completely disagree that two dots of colour, at sufficient distance, can 'additively' mix in the eye. I am not a colour scientist, my knowledge of this is entirely empirical, but I would be interested to hear your thoughts on the matter? Is it possible and if so, how? Is there any known research on trying to find colors outside of the color spectrum?

How do one estimate color of an object by just looking at their reflectance data? What is the relationship? The difference between 'saturation', 'chroma', and 'colorfulness' can be very subtle. Can you explain? Similarly, is there any difference between the related terms 'value', 'lightness', and 'brightness'? What do HSV and HSL describe?

How come it is easier to see a certain color under low light condition while other colors are hard to see? I project two spot lights on a white screen, RGB=(255,255,0) and RGB=(255,0,255), when both lights combine additively, what 'color' I will see? Could I predict the mixture in the RGB Color Space? I am confused by the range value of the Y-tristimulus value. For emissive things, like screens, it is supposed to be the absolute luminance in foot-lamberts (so the range could be 0 to infinity in theory). If want to compare two colors (via deltaE - which deltaE is the 'standard' nowadays), one from a emissive source and one from a reflective source, can I? It seems like a reflectance number couldn't quite compare to a direct luminance measure, but then how can I compare these two things in a color space?

What percent of light is reflected from Brown beer bottle glass? Green beer bottle glass? Clear beer bottle glass? Can females see more colors than males? Artists often find it difficult to identify subtle colors.

Eg: is a warmer or cooler than another? Shadow and reflection are very hard.

The more you stare the easier it is to convince yourself it is almost any color. I have heard that both saccadic eye movements and bending over so as to look at the subject upside-down can be helpful. Do you agree and do you know of any better techniques? Can you explain the science behind gloss levels on the paintwork of a car.

I own an auto reconditioning business and I know using different techniques I try to achieve maximum gloss, even at a microscopic level. Let's say you have the spiderwebbing swirls in your clear coat. Scientifically, what is happening to the light when it hits the swirls as opposed to hitting perfect paint? Is it the law of Refraction or should it be explained another way. Why is light source data normalized to 100 at 560 nm?

Is this the source´s relative spectral power distribution or is that something else? Doesn't the normalization affect the computed XYZ or L.a.b.

values? I am studying the lightness differences in two types of dental crowns. Is there a minimum ΔL that is not perceived by humans? Does color have an objective existence?

If the inability to differentiate blue and black and brown is caused by the gradual yellowing of the lens in our eyes, would wearing another color lens make it possible to see the colors? I'm interested in skin colour and I normally reckon it should lie between 0° and 30° in a HSB colour space.

In the Munsell space the Hue shifts for less saturated colors. Are there recognized skin values in the Munsell notation? What is the most visible color for a motor cycle helmet? What education and degree is required to become a color scientist?

Why does the S-cone see blue-red (i.e. Violet) instead of pure blue? Where does the red come from without the L-cone? Why there is no spectral (pure) colors that can be reproduced by mixtures of other colors? It is just a coincidence of human color vision?

I have a very old FM 100 Hue Test Kit (in a wooden box) but do not have a score sheet. I see all of the new kits have software. What came with this kit as it's obviously pre-PC. Is there any way to predict what color an object will appear if I change the color of the light source? Why is it so difficulty to follow the process of saying the color of the word as opposed to saying the word itself? I am a Colorist, want to reduce validation work in laboratory.

If I add a quantity of pigment and Tio2 paint, and then measure the shade, we get a certain CIELAB value. From that can I predict CIELAB values given a different quantity of pigment and TiO2? Which would yield the least visual discrepancies, a more chromatic color or less chromatic color? I read that Ansel Adams painted the walls of his home studio a 20 percent gray color to be the best background color to display his photos. Do you have any more specific information about this color? Is it warm or cool gray?

Is there an actual paint recipe for this color? I bought a charcoal gray couch - love the color in the store.

In my living room it looks dark blue! What color should I use on the walls and accessories to make it look gray again? Can fluorescent colors be printed with cymk printing system? I have Roland printer that uses eco-solmax inks. Are there any RGB or CMYK codes that will work? In textile color matching, Is it possible to match target color in all light source without metamerism. If so what will be the possibility percentage?

What does a white balance actually do? What makes a color bright? I study the topographic influence on snow.

When an individual looks at snow in shadow, they are actually seeing blue light, yet they state they see white. Is this based on learned experience of color? What effect does the question have, i.e.

'What color do you see', vs. 'What is the color of the snow?' How does a flower´s color help it survive? Many auto accidents happen in early morning and late in the evening when it is dark outside.

Does the vehicle color have anything to do with this? What automotive paint color is easiest for the eye to see when it is dark outside?

How about in daylight? Although our sun is often depicted in artwork as 'yellow', I have heard that it is actually 'white', and that is why a white piece of paper appears white. Is this true? If so and we lived in a solar system with a different type of star, such as a red dwarf or a blue giant, would any objects appear 'white', or would they take on the cast of their light source? Imagine driving down a street toward a traffic light. How fast would you have to go so that the red light (700 nm) would appear green (500nm)? Is there a way to measure gloss with a spectrophotometer or is it necessary to have a glossmeter?

Is there a conversion between CIELAB values and gloss? How can I avoid metamerism? What are L. a. and b.? Are they constants?

If not, how can I find those values? Where can I find calculator or software for LRV? We are told that Red, Yellow, and Blue are the 'primary' colors, and that you can make all other colors from them, but those 3 can´t be made by combining the others. In additive systems, it is red and green that combine to make yellow. Is there something inherently special about red, yellow, and blue, or are they considered 'primary' only in the sense that the most basic medium of color manipulation is a subtractive system? When we compare luminosity of different hues, we find that blue is a relatively dark color, and yellow is a relatively light color.

Do hues have an inherent luminosity independent of human perception? I am trying to emulate a smaller-gamut RGB color space on an LCD display using a 3x3 matrix, and I can not seem to figure out the general-purpose way of doing this. You reference Poynton´s book in a similar FAQ but he skips over the process and just spits out the answer for some important cases. Is there is a device that can measure liquid gravure ink spectral transmittance? I need a method to confirm ink recipe components in a liquid ink sample. I could use a faster option than the traditional draw-down proofing method.

How many lights are metameric to white light reflected from a paper? I use the Munsell Color Books to develop color harmonies for clients to use on short term projects. Is there an inexpensive way to get swatches or chips that match the Munsell notation? Can I print them? Are there studies of floral arrangement preferences of dichromats?

How did the CIE 1931 color matching experiments evaluate the whole gamut when we know that the RGB color gamut is a subset of that of the human eye? In other words, we know there are colors that cannot be matched by the RGB lights. How did they get around this? The sensitivity of the human eye to color difference is greatest at approximately 550 nm. However, in interpreting the MacAdam ellipses, it would appear that humans are least sensitive to differences in color in this region. I measure timber colour using a Minolta Chromameter CR-400.

I want to compare my values with those of other woods whose colors are listed in percent Luminance, Dominant wavelength (λ)and percent purity. Can I convert these values over to CIELAB? Is it possible to scientifically determine the original colors in an old black and white stereoview photograph if some of the colors are known? How does aging affect color perception? Are older people able to discriminate brighter colors or softer colors better? What wavelength(s) are used in the calculation of Gardner color?

Is it possible to explain color to a blind person if thay have never experienced it? Can the brain of a blind person assign a color to something if they know the shape but not the color? I need to predict CIELAB of a color at different thickness. The color is transparent and.01 inches.

How do I predict LAB values at thicknessof.121? Why do different pure hues have differing lightness values?

In his 1943 OSA paper 'Specification of Small Chromaticity Differences' MacAdam describes constants g11, 2g12, g22 and gives values for them in graphical form. Is there a source for this data in conveniently tabulated form? I need a device that will give me color readings at an observer angle of around 45 degrees or so that will pick up almost 100% specular reflection.

Why is it not possible to get an accurate ΔE colour measurement on a metallic powder coating? At what luminance (Candela per meter squared) in the ambient environmental light does scotopic vision turn to mesopic vision, or at what point can we start to see color?

And at what point can we see the majority of colors? What is the most common first color that children recognize? We have a WWI aircraft we are recovering with fabric that requires a dark green paint for the wings.

This aircraft is flown a lot and displayed to the public outside quite a bit. The problem is that this paint absorbs sunlight heat dramatically which reduces the life of the doped fabric, causing it to shrink prematurely and it is fairly expensive to replace. Would a primer coat of silver dope or white help reduce the absorption of the heat into the fabric under the dark green paint? Do you know the origin of a measurement called the 'flop index', which is defined as flop index=2.69(L15-L110)^1.11/((L45)^0.86). My Xrite M68II reports this metric, however, X-Rite does not explain the source of this equation.

Do you know where I might find the source of this equation, or another good way to mathematically explain the color difference at several angles? What is the differance between additive color and subtractive color? I am turning my formal dining room into an art gallery. We painted today and it is too bright. The way it looks now all you will see is the paint color and not the art. What are the best colors to paint a gallery, given that all the pictures are of different color schemes?

Scientifically speaking, is black a color? Is white a color? In comparing light bulbs based on their color temperature, how much difference in color temperature is needed before an average person can notice that difference? Are there any specific details in 45:0c reflectance measurement, such as the effect of distance between detector and sample or distance between light source and sample? Are there restrictions on the circumstances, like the color of the floor on which we put our sample?

Is there any approximation to convert between Hunter Lab (illuminant C, 10 degree observer) and CIELAB (illuminant D65, 10 degree observer)? I received data from two sources. The first measured Hunter Lab on light source C under 10 degrees, the second measured CIELAB on light source D65 under 10 degrees. I don't have the spectra. Is there any approximation with which I can convert between them? What observer for XYZ values can be used in CAM02, 2 degree or 10 degree? Some articles use 2-degree observer, the others use 10-degree observer.

I am looking for the differences between red, blue, green, and yellow dye. Can you tell me anything different about them, other than they are different colors? What part of the spectrum helps grass grow? Why does the color of a crayon or colored pencil look a different color on paper? For example, some purples show up blue on paper.

Would a spectrophotometer be able to accurately read the color differences between chrome plated surfaces? Mirror-like finish) What settings or type of instrument would best achieve this? Is it possible to quantitatively describe a color just by its reflectance or radiative spectrum?

How a mixture of R, G & B single wavelength sources (such as RGB laser) can produce white light even though they do not cover the whole spectrum? Is there a formula for calculating Delta E in Munsell? I would like to convert from CIELAB coordinates into the approximate spectral red green and blue component curves. Is this possible? Why do we see colors when we spin a disc that contains figures in black & white? When job requirements demand color discrimination, how often should employees be tested on their color perception? Is there a color model which would allow me to do the following?

Given L.a.b./XYZ/whatever coordinates of a color stimulus, given specified viewing conditions and color, what is the shape/size of the JND 'ellipsoid' around the color, and what are the directions of the hue/chroma/lightness axes? Is there still a copyright on the Munsell color system? If so, who owns it? Which light colors are absorbed by a yellow tulip? A one dimensional halftone cell has 50% coverage with reflection density 2.0 and 50% coverage with reflection density 1.0. How is L. calculated for this cell?

Are you aware of any software packages or even just charts, that list Munsell colors by both code and name? What colors (in order) would best absorb a green 529nm laser light? Could you please tell me if there is any function that computes the chromatic adaptation and the color appearance for the various types of color deficiencies? How could I provide (or display) the approximate color of a star given it's Kelvin temperature? I am interested to convert a hex html or decimal rgb value to cie 1931. How can I do this?

Is 0.05ppm a suitable tolerance for measuring absorption on a spectrometer for beverages? When is it no longer a visible difference to the naked eye 1ppm, 0.1ppm, 0.01ppm, etc?

What is the best color to paint behind a High Defintion tv mounted on the wall? What dyes are mixed to get Dark Shell Gray? I am a retinal surgeon. We sometimes stain the retina with trypan blue in order to highlight superficial membranes that need to be peeled (over the retina). Is there a colored contact lens that I could wear that would highlight the blue spectrum more so that it would be easy to see faint staining on trypan blue on the retina?

I would like to come up with a color scheme that assigns an absolute color value to common color words. In this scheme I would want scarlet to have a distinct and absolute value different than crimson or puce. Is there any site or program that has assigned absolute color values to the English names of colors? We measure several prints for our printer characterizations. Two questions: (1) what is best space to average - spectral reflectance, LAB or XYZ and (2) if we wanted to do a weighted average to reduce the weight of data which tended to be 'inconsistent', how would we best do that? In the CIELAB color space, what is the approximate difference for each of L., a., b., and ∇E that most people would not percieve as a different color.

Are there guidelines or rules of thumb for how colors are perceived as 'dominant' in an image? Are there differences in the perception of color dominance among different colors? If so, how is this described in the CIELAB color space? Where can I find a chart showing color names, the colors themselves and CIELAB color coordinates? Ideally, this would also show the RGB color coordinates. I have found many RGB charts like this but none with the CIELAB coordinates.

Are there established color values for the color of skin for various ethnic groups (like Lab or Munsell for example)? This is for a makeup manufacturer who wants to design packing for specific groups of people. I dyed 100% cotton red, yellow and blue and placed them in direct sunlight for a week. The red appeared to fade the most, but I can't explain why. Can you help?

Why does red disappear when viewed behind red glass? Are grey shades actually constant, because they are nearly achromatic, or is there something about eye biomechanics that create a visual perception not in agreement with spectral readings?

I need to know the Munsell color for 'school bus yellow.' The unsourced quote I have says it is 9.4YR, 7.5/9.2.

What does LCC stand for in the color science world? Where can I purchase a poster size print of the CIE 1931 Chromaticty Diagram? I realize that the diagram is only a 2D projection of 3D matching data however I still find it useful to illustrate some of the other attributes of the data depicted (color mixing, color temperature, color gamuts)? At what distance, target size and viewing conditions (illumination level/type) does the HVS's ability to resolve color breakdown? Put another way, what is the 'chromatic' resolving power of the HVS and how is that defined in terms of distance, size, viewing conditions?

Is black a natural color or is it just a very dark brown that people just see as black? We would like to know the complete Reflectance Measurement principle and formula for the dual beam color spectrophotometer including Light trap, PTFE standard and sample.

Is there a relationship between visual lightness (when we judge lightness of color) and Light Reflectance Value (a measurement that is expressed mathematically? I am a massage therapist. After a massage a customer said that when I had massaged her on a certain part of her body she could see a certain color, for ex.

Red, & at another spot she saw the color blue. Is there a reason to this? How do you find a RAL equivalent of an NCS colour reference? Why can't humans see ultraviolet or infrared energy?

What color is chroma key paint for green screen back drops? Is it possible to determine the ink densities (or transmissivities) in a small area (20 mm^2) of a four color image (CMYK) from its reflectance spectrum? The relative areas of coverage and overprint of the inks are not known. Illuminant and substrate spectra are available. How would I measure the yellowness of the sclera (whites) of the eye?

Also, what instrument would be an appropriate measure haziness of the cornea? What is the color temperature that makes the road most clear during driving, even under unconditional weather? How do I match the actual fabric color in Photoshop TM?

Images are digitally shot, and the final output is four color offset printing. What is the theoretical principals of the color change test in chemistry? I am interested to convert a hex html or decimal RGB value to CIE 1931. How can I do this? Is 0.05ppm a suitable tolerance for measuring absorption on a spectrometer for beverages?

At what concentration is the difference not perceptible? What would an acceptable max display luminance setting be for a display that does not see direct sunight or much ambient light so that colors and text are easily readable? What is the unit of the viewing angle? Is it degree, radian or steradian? Using the color bar on Powerpoint 2003 I drag the brightness bar on the Device RBG mode, I get a darker color of apparently the exact hue. Is the hue is truly staying the same? Also, if I drag from R 200, to R150 to R50, is it decreasing in the amount of red equally in each interval?

'The Desktop Color Handbook' mentions using a 'light source color rendering card' which has patches that look the same under light of the appropriate CCT, but different under other lights. Do you know who makes such cards, or how one could create one? I am a Color Technician for a woman's retailer which specializes in black, white, and neutral only clothing. We test our associates with the Munsell 100 Hue test. Is there a similar test to evaluate for neutrals only? How can I convert RGB or CMYK shade to Pantone? Is there an accepted universal standard for the calibration of color Spectrophotometer?

Are there white standards available with certified reflectance values? Are there maximum/minimum values for a. and b.

like the min and max for L.? Is color a quality in physics? I have noticed a couple of different species of early-flowering trees have pink blossoms which turn white literally overnight. It is the speed of the process which is intriguing. Do you know how it works? Do you know where I can purchase Hess Ives Color standards, both physical standards and papers publications? How can tulips be so many different colors when they are the same plant?

Is there such an instrument as a hand-held spectrometer for measuring the color temperature of light sources? If so, how much do they cost? Densitometers can be purchased with or without polarizing filters.

Free Rgb To Ral Colour Converter

Why are both types used? Which type provides the best correlation to perception? How do you convert ΔL ΔC ΔH values for colour differences in CIELCh to the equivalent ΔL Δa Δb colour difference values in CIELab, when you do not have access to the absolute values for the original measurements? Are there some basic averages for the LRV of human skin? At what age do children develop good color perception?

Can you define what is Multiflux math model used in color mathing? I have used three online color space conversion calculators and I get three different sets of numbers when I convert from XYZ to RGB. What's happening?

Can light be a 'Brown' color? If not, why not? What is the RAL number for PMS 268 plum? I've attempted to find a cross-reference tool and have not been successful! When purchasing an encapsulated Haz-mat suit, Level A, what colors have the best visibility for the different environments in which they might be used, i.e, sandstorms, snow, heavy rain, thick smoke, etc.? Roughly how large is the overall remaining perceptual non-uniformity of color tolerances in CIELab space, when using the ΔE94 and ΔE2000 color distance formulas? Fender banjo serial numbers. (as compared to the 6:1 non-uniformity of simple ΔE.ab)?

How can I have someone create a paint for me using a theoretical spectral reflectance curve? How does chameleon paint (i.e. Paint which color depends on viewing angle) work?

What is its composition? How do I calculate the dominant wavelength of a color sample with X,Y,Z or x,y? I do not want to draw it in the colorspace. Why does your hair change color during the season? How to convert CIELAB data to Yellowness and Whiteness index? Which minimizes solar heat absorption better, polished aluminium or white paint on it? How does the eye determine the various colors of visible light?

Could you please tell me, what color would 1.2Y 6/11 be? Why do black clothes appear blue in the artificial light of a clothing shop? Then when you take the item into natural light it is black?

What type of Pantone Guide shall we refer to & which instrument is suitable to measure the values of colour on aluminum foil with a flexo printing process? Since Aluminum has glossy as well as the matt finish then is there any need to change the settings of the instrument?

We print on Aluminum foil with a flexo process. What type of Pantone Guide shall we refer to & which instrument is suitable to measure the values of colour? Since Aluminum has glossy as well as the matt finish then is there any need to change the settings of the instrument? How do I convert from spectral reflectance (from a hyperspectral imager) to CIELAB colorspace? Can a consumer grade flat bed scanner be used as a colorimeter? The lighting goal for our new indoor shooting range is to have 100 footcandles of light on each target. Our question is this: should the walls and ceiling around the target be light in color or dark in color?

Can you suggest an ideal color scale for a digital elevation map to be printed in a scientific paper? Is it possible to have a color scale that looks good in color and in black and white?

Suppose I introduce the same amount of noise in individual channels of a YUV image of 420 format (chroma has been downsampled). Which image is the most noticeable, the one with noisy Y, U, or V? Can you point me to the actual formula the Photoshop Hue/Sat tool is using to change given colors in an image?Can you point me to the actual formula the Photoshop (tm) Hue/Sat tool is using to change given colors in an image?

What are the colors of a complete spectrum? (Starting with the color with the longest wavelength.) What color measurement system would be best to define colors for a liquid, to be described in a US patent? Why is blue ink most commonly used for writing?

What is the difference between the L.a.b. values and the L a b values when using a Minolta colorimeter? Do you do research on ink jet printer color consistency? We are interested in printing solid colors for visual evaluations. We have a high-end ink jet and use photo paper, but we see color differences of up to 0.5 Units ΔE. between prints using the same printer, inks, profile and paper. My spectrodensitometer states its measuring geometry is 0/45, and its standard observers are 2 and 10.

Are these angles related? Which should I use? Is there a way to determine what a symmetrical circle 1% dot, 120 line screen should measure?

I am looking for a published table or a equation as I need to determine this on several different screen rulings. I am working on a plastic matched automotive black (GM 848) where the color is visually darker, but it measures LIGHTER than the standard. Can you please explain why? What is the mathematical equation to convert Lab or XYZ to Density?

I sometimes catnap at my computer or while reading and when I wake everything looks green tinged for about 20 seconds. Does the color of a laser affect the velocity of the light wave projected by the laser? What is the physics behind a blue-yellow polarizer such as the Singh-Ray Gold-N-Blue filter which photographers use to add yellow or blue highlights to polarized parts of a scene?

Is is possible to convert R, G, B values of an image captured using a flatbed scanner to densities? I can convert R, G, B to CIELab using the ICC profile of the scanner. Is there a way to convert CIELab to Densities? Where could an art reproduction facility obtain an optical device that used spectral-based imaging? We know density is derived from the transmitted spectral power distribution. Can you suggest a reference that provides the responsivity functions for Status A and Status M densities, as well as the specific function for the calculation of density?

Also, what is the proper illuminant to use? What is 'camera gamma' and its relationship to NTSC/HDTV video?

How does coloured text affect accommodation? How can I meaure the color of clear solutions?

We want an objective measurement (wavelength) of colors of various juices and wines. When choosing an umbrella, what color is best to protect yourself from UV light? I am teaching color theory to our press operators and I am wondering if there is a full color spherical L.a.b model illustration that I can download, and if necessary purchase. I would like to know if the color of the water (by adding food color dyes) will affect the absorption rate of water and thus the color of the white flower over time. What is the Kubelka Munk Theory? What its use in textile dyeing process? Would you please provide me any literature on the Kubelka Munk theory?

Is there an existing paint industry standard system for expressing (and thus potentially matching) all the visual characteristics of a metallic or metallic flake paint, whether one-coat or two-coat (colored transparent over metallic or flake)? I am trying to calculate the colour of a coating.

I have a graph of wavelenth versus reflectivity. Is there a simple way to convert this graph into RGB values or some similar standard? Since a mirror reflects most of the light that falls on it, as does any white body, what is the difference between the two? I know that the color of a body depends upon the color that it reflects. What causes some bodies to be transparent, others translucent still others to be opaque? I found a source that says an RGB of 194, 32, 11 for Calder Red.

Can you tell me what proportions of red, yellow, and blue paint should be mixed to get that RGB? Where can I buy Baker-Miller pink paint? I want to make a slate grey color from white exterior latex paint. What additional colors and quantities of color will I need to mix? This pertains to colors being used for home theater projection screens. Neutal grays have been suggested as the best color since they should not shift the color of the reflected image.

Munsell grays are reported as neutral for illuminant C. What would the RGB value be for Munsell N8 and N9 under D65? One source lists N8 as 202 202 202 (L.ab- 81.3256 0.0044 -0.0087, Yxy as 59.0619 0.31272 0.32900). Is this correct? I am an artist interested in painting with photochromic inks or paints. Do you know of a supplier?

We have two items painted with Munsell N7 which are significantly different in shade. Is this normal?

How can I measure if the differences are within specification? I am building a pit solar greenhouse and need to decide what color to paint the non-glazed walls. White would be the best for reflection onto the plants but I am also looking for more pleasing colors. What is the best color for growing plants? Why isn't E point (x=0.3333 - y=0.3333) used as a standard illuminant for color matching and ΔE? I am working on honeybee color vision. Using a honeybee specific color diagram, we know how to calculate dominant wavelength.

How do I calculate the dominant wavelength of a color sample which resides in my color diagram in the 'magenta' (or purple) zone. Why are the colors of Christmas typically red and green? I work for an automotive finishing company and use an X-rite MA68II for measuring color. Which should I use, L.a.b., or L.C.h? Everyone seems to use L.a.b., but I'm not sure why. How long does it take for your brain to recognize color?

Can you provide a mathematical formula to convert a RGB color value in CMYK color value? How do mood rings work? At what illuminant temperature are Munsell neutrals (N6, N7, etc.) designed to be neutral? Obviously having a single colour on two different stimuli (each encompassing a different meaning) on a workstation will cause confusion. What are these problems from a psychological, cognitive, or ergonomic perspective?

Are the colors that we see during the day, present at night - only we cannot see them? Or are the colors that we see during the day not present, or altered, because of the low light? What are the names of pigment suppliers who mfg or distribute metameric pigments?

What are the evolutionary advantages and disadvantages of impaired color vision? I am developing paint color regulations to help buildings constructed on mountainsides blend into their surroundings to minimize their visual impact.

What maximum LRV do you recommend for an environment typically consisting of darker browns, grays, and greens as the 'base' colors in order to keep buildings from 'standing out'? What would be the most appropriate instrument for measuring the LRVs of paint/stain for enforcement purposes? How does the color of a room affect people's moods? What are the equations for McAdams ellipses? Are they location dependent in the 1931 chromiticity diagram? It makes sense that I should want window glass with the highest Color Rendering Index available in the performance category that I need; but how do I judge the relative CRI when all options are between 87 and 95?

What mixture of acrylic painiting do I need to achieve a copper tone? Can CAM02 to predict Appearance Correlates of a color on different colored backgrounds?

Is it proper to state a Munsell notation for a metallic or pearlescent color, or is Munsell a solid color only notation system? Is it possible to draw plankian line in CIE diagram? Is there any source of spectral reflectance data for samples in the Munsell Book of Color? Does the Munsell system account for the Helmholtz-Kohlrausch effect?

How closely do the Munsell Renotation data reflect the actual tristimulus values of samples in the Munsell Book of Color as viewed under Standard Illuminant C? Why does the sheen of a finish affect the appearance of a color? Do the wavelengths of color get magnified, refracted, or intensified as the pass through the layers of a paint film?

Can you explain the difference between value and luminance? Is Light Reflectance Value different than luminance? I understand that the visible spectrum is comprised of the wavelengths red, orange, yellow, green, blue, indigo and violet. Combined they make up white light. So does that mean that white is then a wavelength too?

Do all the other colors/wavelengths add up to something that we recognize as white? Does the color of your hair affect it's ability to keep your head warm? What's a good reference for information on the Munsell system?

Where can I buy Color Standard for measurement calibration? To measure process color is it better to use a spectrometery or density, hue, and gray? Where can I find absorption or reflectance data for inorganic chemicals or pigments? Is there an index for the degree of yellowing? I want to characterize the degree of yellowing in trees as an indicator of poor health from aerial RGB photographs.

Please give an example of how to begin with a tertiary color,subtract one color and then subtract another color but don't end up with a primary color. Where can I buy the Munsell color chart that has the 14 samples used for CRI tests?

Where do the beautiful colors of fireworks came from? Why does the greenery of parks and gardens look beautiful to our eye? Please elaborate with regard to perception and function of the eye. Do you a reference for this equation used to get color decimal value from RGB values: 'colorcode = (r.65536) + (g.256) + b' How precise areMunsell color charts meant to be read?

What makes colors fade in plastics? What part or parts of the light spectum? Are there any instruments or methods which measure the intensity of gray color? What the physical meaning of sharper cone reponse in CIECAM02? How do paint colors affect the room temperature? How can I mathematically find the best match for a CMYK color from an array of CMYK colors?

I have some images taken with a digital SLR at the wrong white-balance setting (tungsten instead of daylight). Is there a fixed set of RGB correction factors that I can apply to the entire batch? Why do boys choose blues, grays, black, and browns when coloring and girls choose more brighter colors like greens, reds, oranges when coloring? Do some people, through genetics, have dramatically different 'rods and cones' in their eyes and see colors totally differently than 'most people'. This does not include colorblindness, but that some people might see red as yellow and blue as orange, etc.

Is this true? I am trying to establish a color system criteria for silicon parts which are white. What do you suggest in setting up a criteria for the color white? What is meant by plankian locus?

What is its importance? Are there any estimates of the probability that a photon impinging upon a cone photoreceptor will be absorbed by the visual pigment within the receptor?

How does this probability change as the radiance is increased so that more of the pigment is in the bleached state? Can a person with a color deficiency learn colors and shades and be able to distinguish differences even if they are not able to see the exact color that a normal vision person might see? Would it be possible to correct color blindness (for computer users) by measuring a user's color sensitivity at various wavelengths, then adjusting the output of the monitor to compensate for it? How do I calculate whiteness index (WI by ASTM standards) if I don't have a spectrophotometer but am in possession of reflectance data for materials that have.