Questions about the different ways color can be quantified and indexed, like for example RGB, CMYK, Lab or HSB. Also applicable to questions about communicating between different color spaces.
1
vote
3answers
70 views
Color wheel with constant subjective hue gradient (better than CIELAB)
I'm looking for a color space that gives me a color wheel where two pairs of hues each with the same number of degrees apart gives the same perceived distance of hue.
I found this for the CIELAB ...
1
vote
1answer
35 views
Are there any tool to preview colors across devices? [closed]
Just wondering if anyone knows of an app or website that will approximate how images commonly appear on mac, pc, android or iPhone. Kind of like a proof setup view in Photoshop but for more color ...
0
votes
2answers
47 views
Assign Profile using a custom color profile from another image
First, I am still struggling to fully understand color profiles, but I feel like I have most of the basic concepts. I welcome any corrections to any misunderstandings revealed by what I am asking, ...
0
votes
0answers
38 views
Problem with colors when making a CMYK document
I'm making my portfolio and as I understand, everything that has to be printed has to be set in the CMYK color mode. So, I chose CMYK. I'm using Illustrator CC 2018. The file tab shows the information ...
2
votes
2answers
64 views
Match projected RGB to printed CMYK
We produce projected slides (RGB) and printed posters (CMYK) that sometimes appear adjacent to each other. We find that the same graphics looks very different in the two mediums. How can we adjust the ...
0
votes
0answers
34 views
Washed out (desaturated?) colours when printing large scale map to plotter (HP Designjet T2500)
I'm trying to print a map in A1 to a plotter (HP Designjet T2500). The map has been exported from ArcGIS in RGB colour space to an Adobe PDF. I'm then printing to sRGB colour space on the plotter. The ...
0
votes
1answer
23 views
Munsell color system gray values
I am working with the "real.dat" data found on the following site:
http://www.rit.edu/cos/colorscience/rc_munsell_renotation.php
However, the data is missing the central column of gray values where ...
2
votes
3answers
144 views
Why is azure used instead of teal as cyan in color mixing?
Why does azure make a better cyan than teal for color mixing?
On the HSV spectrum, cyan sits at 180 degrees, which is bright teal, whereas most printer inks and best primary blues for painting and ...
2
votes
2answers
74 views
Interior of Johannes Itten's color sphere?
Johannes Itten's color sphere is described here. The description includes an English translation. Here is one of his drawings:
For reference, here is a vertical cross section of Albert H. Munsell's ...
2
votes
2answers
146 views
Interior of Munsell's sphere?
The Munsell color sphere is described on Wikpedia.
But what does the inside of the sphere look like? There is some conjecture on Wikipedia (most of which is original research), and I can only find ...
0
votes
1answer
323 views
Accurate RGB to CMYK conversion [duplicate]
I am trying to print out a simple picture (below) that is composed of sections of the following RGB colors:
255,0,0
255,0,255
0,255,0
0,255,255
0,0,0
I am using this image for color sensing (...
0
votes
3answers
225 views
RGB to CMYK conversion problem
There is a situation where I have to transfer colors in Hex Format (from an app) to Adobe Illustrator. But I need to extract the exact CMYK value (that was assigned in the previous app).
Long story ...
0
votes
1answer
46 views
Why does Photoshop CS6 open new documents in grayscale mode?
When I open a new document in Photoshop CS6, it opens in grayscale mode. How can I change this?
0
votes
1answer
148 views
RGB color Setting in Illustrator
I am working on Color Settings:
Working Space: Adobe RGB (1998)
CMYK: U.S. Web Coated (SWOP) v2
When I Export the artwork to JPEG, it gives me the different Color output.
Then I have to Assign Profile ...
4
votes
1answer
431 views
I select a color in Photoshop and it's painting another one
I select a color in Photoshop and it's painting another one. I've checked RGB color mode and everything, but it seems to continue to change the selected color. How can I fix it?
0
votes
3answers
110 views
Should a Hex value match its RGB value in a Brand Guideline document?
Our organisation is using a brand guidelines document (produced externally) where the hex values and the RGB values of corresponding colors do not match.
Both RGB values and hex values use the same ...
1
vote
7answers
366 views
Why aren't there printers that use red-green-blue ink cartridges?
Why aren't there printers red-green-blue ink cartridges?
I would like some well-documented articles on this because I haven't found anything comprehensive. The best I've found are this and this on ...
1
vote
1answer
47 views
Is there a way to get correct color mixing without posterization, working with 8 bits only? Or something better than Linear RGB color space mixing?
I'm in search of a practical and orthogonal solution that preferably:
Affect any blending mode.
Can produce the most correct possible additive mixing.
Produce the less posterization possible on ...
1
vote
2answers
114 views
Can monitors show colors outside of RGB space?
Modern monitors use RGB to reproduce colors. The [RGB colorspace, however, is not the full range of colors, and only occupies a triangle in the "full" chromaticity diagram][1]. What colors are ...
4
votes
3answers
321 views
InDesign color accuracy for calibrated PDF and JPEG exports [closed]
This is an age old question that litters the internet. I've been working in design for coming on two decades, so am fairly up to speed with color profiling for devices, images and proofing. I've sent ...
1
vote
0answers
38 views
Illustrator CC changing color of half my file on PDF export [closed]
Using Illustrator CC, we save all our CMYK illustration files in PDF format. I just encountered a file where the copied half of the file (the design just copied over to the second half of the paper) ...
2
votes
5answers
217 views
Separating two very close colors in GIMP (2.9)
I'm working on restoring an old drawing that wasn't stored properly. The paper (might be parchment) has yellowed, and the lines have faded. This results in the lines (the good part) being almost the ...
3
votes
1answer
49 views
Do Adobe RGB and sRGB assume 2 degree observer?
I know that Adobe RGB and sRGB assume D65 illumination, but do they assume a 2 degree or 10 degree standard observer?
1
vote
1answer
82 views
Creating logo files for printing and web
My client has asked for their logo files, (the source file is vector AI created with Illustrator). He wants a file for the web/printing letterhead (online and paper invoices) and a vector file for the ...
0
votes
1answer
328 views
Computing the range of CIE L*a*b*
I am currently using C# to compute the range of various color spaces. One such, CIE Lab*, is giving me a headache.
To compute the range, I enumerate each possible RGB color, convert it, and store ...
3
votes
1answer
411 views
Lab Color Space in photoshop
If Lab Color space covers colors that are not supported by monitors how come photoshop are showing Lab color space in their colorpalette? What is the purpose of it? If I give Lab values as L-(85), a-(...
0
votes
1answer
716 views
Check colourspace in InDesign
So I've seen this answer on here:
Indesign RGB color space
But I'm wondering how do I tell what colourspace is currently applied to a document? I think the one I'm currently working in is set to CMYK,...
1
vote
1answer
773 views
How does one create a color wheel in Illustrator
How does one go about creating a VHS color picker shown below? I know it has to be a gradient around a circle, but then toward the center it gets lighter. The center is white.
P.S. I have looked at ...
0
votes
1answer
323 views
Why does the color of my image change when it's reviewed on a mobile device?
I exported my vector CMYK file from Illustrator as an RGB image. On my customer's mobile, the colors change and he can not review the work to approve it.
What can I do to display the correct colors?
0
votes
0answers
78 views
sRGB+RGB Illustrator file still exports PNG in wrong RGB colors?
I have a logo in Illustrator sent to me by someone overseas. Exporting it from my PC results in a darker, more subdued logo. But when I copy and paste the logo into a new Illustrator CC Web document ...
0
votes
0answers
29 views
WCAG contrast ratio formula & How they translated into wide gamut?
Why the highest contrast ratio in WCAG is 21:1, not 256:1? Can anyone explain the concept of the formula to me, in laymen's terms?
Does the current guidelines change as we step into the world of wide ...
0
votes
1answer
143 views
EPS file distorts on export in Indesign
I am an Indesign relative beginner (especially related to complex color correction). I've imported an EPS logo file into the document (it's currently layered over a photo) and in preview mode, it ...
3
votes
2answers
668 views
Why colors change when I export from Illustrator to Photoshop?
I am working on a Illustrator file that I need to export to Photoshop to edit.
When I'm exporting it changes the color of my black and it becomes quite dull. The same thing happens when I export it ...
9
votes
4answers
409 views
Why should I calibrate my screen?
As both a web and print designer, I have never seen the need to calibrate my displays. Especially for web design, I wonder why I should spend several hundred euros to calibrate when I can instead test ...
0
votes
2answers
100 views
Consistent Color Management Across Printers
How do you manage a specific color, to print consistently across different printers / ICC profiles?
I have a long time client and their brand color is a specific shade of coral rgb(250, 128, 112). I ...
1
vote
2answers
656 views
RGB or CMYK for resume/portfolio
Is it best to use RGB color-space when you don't know if the end-user of the document is going to be printing the document on an inkjet or laser printer? For example, even though my home printer has 4 ...
3
votes
3answers
774 views
Overlap RGB values to produce a single color
I am new at graphic design (obviously) and I would like to create a logo with overlapping colors to produce a desired color. In this case I would like to overlap 3 distinct colors (with I assume ...
0
votes
0answers
47 views
Is the low statistical correlation between the HSV channels, conditional upon the color name, a well known property of the color space?
I have been investigating color as part of a academic project.
One of the assumptions I make as part of a larger project,
is the conditional independence of the 3 channels of HSV, given the color name ...
2
votes
1answer
255 views
How to create a customized color cycle picture?
It is part of a university project visualize displacement of speckles between to pictures. To do that I use the HSV color room, so the angle of displacement is respresented by hue and the displacement ...
3
votes
3answers
979 views
What happens when you print without converting to CMYK?
When exporting InDesign files as PDF, it is converted usually to the intended colour space. But, what happens when you don't do that for whatever reason and send the non-converted PDF to print?
Since ...
0
votes
1answer
70 views
Why two identical images forces two different color shade?
So, i have two images CMYK/8 bit to one image I set color #00ade3 to a shape, I then do the same to the other image (also same shape, just bigger) and it forces my color to #04ace3 instead, no way to ...
1
vote
1answer
138 views
How to determine the difference of color vibrance of a pair of images?
I'm an engineer, so my terminology may be incorrect when posing this question.
I have a pair of pictures below and the top one is clearly more "colorful", "vibrant" and "saturated". The bottom one ...
0
votes
2answers
2k views
Illustrator: which settings to design a logo for print [closed]
What settings should I use when creating a document for logo printing? Looking to achieve the best quality for my logo design.
6
votes
3answers
516 views
Interpreting a* and b* in L*a*b* color space
In L* a* b* color space, I know L* corresponds to "lightness" so that as L* increases I can say colors are lighter. Is there a similar term that corresponds to the color channels a* and b*? For ...
3
votes
1answer
294 views
How to Generate Swatch Library from Json file?
I'm looking for a way to generate a swatch library from a JSON file in Adobe Photoshop CS6. Unfortunately, I can't seem to find anything on the web about this, and I don't know how to write my own ...
1
vote
2answers
523 views
Is D50/2 or D50/10 more typically used in graphic arts?
I was given some LAB measurements of color samples. The LAB measurements came with a statement that the illuminant is D50, but no specification of what standard observer was assumed (it would be ...
3
votes
1answer
140 views
InDesign: TAC of sRGB photos exceeds ink limit - does this cause issues when encapsulated in a PDF-X/3 document for print?
I'm using InDesign and I am exporting a photo book for an online printing service (Blurb) in PDF/X-3 (I use unaltered an Export profile that they provided). In the Output tab of the Export Adobe PDF ...
0
votes
1answer
177 views
File created in Photoshop looks different in Illustrator
I need to design a letterhead and I have this watercolour effect which I created in Photoshop (RGB file). I want to take this to Illustrator and work with this as part of my design for the letterhead. ...
1
vote
3answers
490 views
Besides pantone colors, is there any refrence database for equally distributed fashion colors?
I'm trying to divide color space into 150-200 colors. I'm looking for Hex code/ RGB values and corresponding color name that is simple, well known & understandable by normal people. Is there any ...
0
votes
1answer
179 views
Are XYZ tristimulus values and x y chromaticity coordinates unitless?
For the CIE1931 XYZ tristimulus values and x y chromaticity coordinates, I think these are unitless quantities. I have checked different plots of these quantities and haven't seen their units labeled, ...
