Questions about the different ways color can be quantified and indexed, like for example GRB, CMYK, Lab or HSB. Also applicable to questions about communicatin between different color spaces.

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37
votes
10answers
46k views

What is the difference between CMYK and RGB? Are there other color spaces I should know?

I'm a photographer, who dabbles in graphic design from time to time as well. What are the differences between the various color spaces?
22
votes
10answers
10k views

RGB and CMYK: Why both?

Any of you who have at least little experience with graphic design software, photography or professional printing, must have -almost undoubtedly- have gone through this: 'the struggle' of RGB and CMYK ...
14
votes
7answers
22k views

How to convert RGB colors into CMYK (real paint colors)?

How can I convert an RGB color into a real life color? If I mix equal amounts of red, green and blue paint together in real life, I will never achieve a white color, in the way you do when setting ...
11
votes
3answers
3k views

Choosing colors that work well on projectors

When specifying colors for use in a software user interface, what's the best way to ensure that those colors will look acceptable on all common display technologies: CRT, LCD, and in particular ...
10
votes
2answers
3k views

How to calculate other colors with the same perceived lightness as a given gray value?

This is related to a question I asked on tex.stackexchange, which has a color aspect. The result of that question is the following image: I have drawn a series of gray squares on the left, with a ...
10
votes
2answers
12k views

What's the difference between Monitor RGB and sRGB?

Since the output is web, RGB is choosen, but is there any difference between "Monitor RGB..." and "sRGB..."? In Photoshop, they are both under color settings > working spaces > RGB
9
votes
4answers
565 views

Regular colors vs Muted colors

What are muted colors? How do I create muted colours? How do I convert standard colors to muted colors? Why do muted colours look the way they do? Why are they different? Here is a bunch of colors ...
9
votes
1answer
1k views

What ICC profiles does Adobe Illustrator use to convert between RGB and CMYK in its color picker?

I'm trying to understand Adobe Illustrator's color conversion method between RGB/HSB and CMYK. I'm pretty sure they use ICC profiles to do the conversion, and they make a bunch of ICC profiles ...
8
votes
1answer
722 views

What is six-color (6C) process printing?

What is 6 color printing, is it multicolor process printing? What setting do I have to keep in Photoshop, Do I have to create an extra channel in the channel palette?
8
votes
2answers
1k views

How do you avoid bands of prominent color in gradients?

So this is more scientific visualization than graphic design, but I think the theory is the same. In colormaps used for visualizing data, there are often bands of color that stick out when they ...
7
votes
2answers
65k views

Why am I only getting grayscales / monotones when applying colors in Adobe Illustrator?

When I try to change the color after tracing a JPEG image in Illustrator and expanding it, it becomes gray. I have tried lots of color changes but the result is always the same. Why can't I change ...
7
votes
4answers
3k views

How to keep printed documents accurate color reproduction

Is there a way to widen the gamut of a CMYK print so that the darks stay dark and the lights stay light? I suspect it has something to do with color space being exported, but I don't know how to ...
7
votes
2answers
5k views

Why are colors shifting when converting from CMYK to RGB in Photoshop?

I have an image that is CMYK and I have tried to convert it to RGB so that I can edit the colour of the image. However it won't let me work in 32 bit and asks me to convert the image to 16 or 8 bit to ...
7
votes
1answer
171 views

Is there a metric for “apparent” chroma?

I'm not sure this is the right place to ask, but is anyone aware of a metric for apparent chroma? Now I understand that "chroma" and "chrominance" are very overloaded terms, so to clarify, I ...
6
votes
1answer
141 views

Help me understand how the “RGB Colorspace Atlas” by artist Tauba Auerbach was made

http://www.thisiscolossal.com/2012/09/tauba-auerbachs-rgb-colorspace-atlas-depicts-every-color-imaginable/ The "RGB Colorspace Atlas" by artist Tauba Auerbach is supposedly every RGB color, ...
5
votes
1answer
167 views

Color loss during colorspace conversions

Why are conversions from a smaller colorspace to a "larger" one often lossy? How can a smaller gamut have colors that cannot be represented in a larger (overlapping) gamut?
5
votes
2answers
245 views

Do designers use different color palettes for web and print design?

I'm designing a brand for a startup company, (new to freelancing) and I'm trying to make my color choices suitable for printed documents as well as displaying them on web. Using Illustrator (doc in ...
5
votes
1answer
154 views

How large are the HSL/HSV colour spaces with respect to Lab?

I could find numerous resources that specify how colour spaces such as RGB, sRGB and CMYK cover a part of the CIE XYZ Lab colour space. I could find numerous graphics displaying the RGB and CMYK ...
5
votes
0answers
244 views

Embed color profile into a PDF with Inkscape

I'm using Inkscape v. 0.91 under Linux Slackware, compiled from the source with the default options. The printing service I use requires the "ISO Coated v2 300% (ECI)" color profile, which I have in ...
4
votes
3answers
271 views

Should I scale an image first, or index it?

I have an image, it's the Backtrack_5_PitchBlack.jpg found at http://www.backtrack-linux.org/screenshots/, and I'd like to get it down to 640*480 for a Grub4DOS splash screen. Unfortunately, this also ...
4
votes
2answers
3k views

Should I use Hex or RGBA when designing a website?

I know this has appeared on StackOverflow already: Are there any good reasons for using hex over decimal for RGB colour values in CSS? Use HEX or RGBA But I'd like to ask on here since we're ...
4
votes
3answers
340 views

Why can't I just download a premade color profile from the internet for my monitor?

Shouldn't the manufacturer of my monitor already know how it differs from the standard?
4
votes
1answer
73 views

What's the relationship between color spaces and color profiles when working in Photoshop?

What's the relationship between a color space document and the color profile of a image or layer included in this very same document? I don't get how they work together, I was told that my exported ...
4
votes
3answers
177 views

HSL instead of HSB in Photoshop CC 2015

I'm a front end developer and I'm having issues with Photoshop. I have the HSB value in the Color Picker but I can't use it, because I need ligthness instead of brightness for CSS purposes. That's a ...
3
votes
2answers
46k views

Indesign RGB color space

Is there a way to set the colorspace to sRGB in indesign? I remember doing this in indesign cs3 years ago and i can't recall how to do this for cs5.
3
votes
3answers
125 views

Need help understanding the difference between RGB and CMYK [duplicate]

I am a web developer that fancies myself on being graphically savvy, but I am far from a graphical designer — everything I need is able to be done in raw HTML and CSS. The marketing director at our ...
3
votes
2answers
3k views

Antonym / opposite of Pastel Color Space (Color Scheme?)

In color spaces we have the regular solid colors like solid red (#FF0000), solid green, solid blue, etc. ... Then when we add about 50% white ontop of it, it becomes a "pastel" color space... What ...
3
votes
1answer
353 views

How to create a color of the same brightness and saturation?

Let's consider three colors: Red, Green and Blue. For blue I created a specific shade, something like #F2F5F7. If you see this color, it has a certain level of shade, brightness and saturation value ...
3
votes
4answers
380 views

Why are Pantone Color Bridge (UP) so different to Pantone Solid (U)?

I've recently bought Pantone Uncoated Color Bridge fan guide (I've owned Formula Guide for some time now) — it's great. What surprises me though is the obvious color shift in Color Bridge (UP) colors. ...
3
votes
1answer
25 views

Why won't my RGB file print as RGB in InDesign?

In InDesign, I have a file that's RGB (and I set the 'intent' as web, so the program is reading it as an RGB document-I could see it), but it's printing CYMK. what printer settings do i have to ...
3
votes
2answers
94 views

How should I match Pantone / CMYK / RGB colors for my designs?

I am going to buy Pantone (C/U) and CMYK (C/U) patterns. How should I choose the colors for my designs? First CMYK, then Pantone and RGB last?
3
votes
1answer
650 views

How to get RYB complementary colors in RGB imaging software

I am looking for a way to get RYB complementary colors in software. This means, complementary color pairs I am looking to get would be: red - green yellow - violet blue - orange However, when ...
3
votes
1answer
42 views

Is there a clean way to use primary colors as a partial background in a book cover?

A lot of UI guides advise against using primary colors as a background for text. I'm in the process of designing covers for a series of 4 books, and I thought it would be good to have a band across ...
3
votes
1answer
43 views

EPS file looks great in AI but washed out in Mac Preview or ghostscript

I have an EPS file that, when opened in Illustrator, looks great. AI can export to a PNG that also looks great. When I open this file with Preview on OSX, or use ghostscript/imagemagick to convert it ...
3
votes
1answer
249 views

How can I set CMYK values in Scribus?

When I create a new CMYK color for my document, the color’s values change when I edit it back, as you can see in this animation (sorry for the bad quality): For example: 65,00% becomes 65,10% ...
3
votes
1answer
96 views

Perceptual colour space as working space

We know from after images that violet-yellow, blue-orange and green-magenta are perceptual complementaries. When I am designing I would like a hue wheel that reflects these perceptual ...
2
votes
2answers
167 views

What's wrong in this “logo”?

I'm trying to do a logo for myself, just to put it in my apps. I just drawn (by hand) my Surname-Name, flipped the name vertically, added a background as you can see. I know that usually there is a ...
2
votes
2answers
245 views

Brand Guideline Colors Don't Match Pantone [duplicate]

I'm in the process of starting a new company, and am trying to create the brand guideline document, so I'm having to learn all about RGB, CMYK, and Pantone from scratch, so apologies if this is a ...
2
votes
1answer
9k views

Tools to convert from 16-bit RGB to 24-bit RGB and vice versa

Are there any image editing or research tools, commercial or otherwise which will allow me to: map colors (images) from 16-bit RGB (565) space to 24-bit RGB (888) space or vice versa save files in ...
2
votes
1answer
780 views

Global color settings for illustrator / keeps switching to gray

Is there a setting in illustrator that will make all of my colors, in all new projects, RGB? I'm not really sure why it often ends up as grayscale. I only use RGB for web assets and having to change ...
2
votes
2answers
180 views

Photoshop Relative Colormetric conversion inconsistent?

The Photoshop relative colormetric conversion seems to be inconsistent. I'm converting from Adobe RGB to sRGB. Settings are as follows: I open the same file twice and run the same conversion. The ...
2
votes
1answer
172 views

CMYK color space?

I open an EPS file containing a company logo (using Illustrator), and see that the color they used is described as C,M,Y,K values in percentage. But I don't see any kind of color space attribution. ...
2
votes
1answer
6k views

Photoshop: Should I use my monitor's color profile (under proof setup/colors) when designing for desktop?

The title says most of it...not sure whether I should set Photoshop to Monitor RGB color profile and set "show proof colors" to true when working on desktop layouts. I notice that Firefox uses my ...
2
votes
1answer
247 views

Choosing appropriate text color with given background

I have an image with green background, lets say #5F7642. I need to add small text in red color over that background. The problem is, usual red colors pretty much fade in with the background. I need ...
2
votes
3answers
617 views

RGB to CMYK conversion — more than one way?

Occasionally a science journal asks authors to submit figures as CMYK (JPG or TIFF) for publication. When I have done this in the past, the colors in the figures end up looking very muted and washed ...
1
vote
2answers
390 views

Is there a printing press that can print a book directly from the RGB space?

I have a book ready for printing. But, of course, it was done in RGB. In fact, I stretched the RGB gamut beyond its normal range in order to make it more painterly etc. When I saw it converted to ...
1
vote
2answers
2k views

Open source software to reduce colours to custom optimised palette (quantize) (for paint-by-numbers)

I want to manipulate a photo so that the number of colours is reduced significantly (to say 15-50 colours which I would specify the number). I would like those colours to be automatically optimised ...
1
vote
1answer
56 views

A quick and reliable test for linear a nonlinear color response with a given application / hardware?

There is an insane amount of confusion between linear and non linear response to color mappings, it depends on the drivers, the software, the hardware, the settings in your applications, what kind of ...
1
vote
3answers
1k views

Laptop screen for digital design

I am searching for a laptop with a screen that is suitable for digital design purposes What I am particularly concerned about is a statement made by a poster (on here): (the objective is to) make ...
1
vote
2answers
467 views

Color not transferring from Illustrator to Photoshop [closed]

I have an Illustrator file and a Photoshop file, both are setup as RBG color spaces. But when I copy and past from Illustrator to Photoshop the color changes. For example #b74eab becomes #a6349b. I ...