Questions tagged [color-spaces]
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.
155
questions
1
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1answer
20 views
What do you call (S×V) in the HSV color model?
What do you call the quality of a color being “vivid,” or in other words, the quality of a hue being distinct and recognizable? Mathematically speaking, what do you call (S×V) in the HSV color model?
0
votes
1answer
38 views
For web, should a P3 image be converted to sRGB or left in P3?
When preparing graphics for the web, if an image is using Display P3 color space, should it be converted to the so common (and so unfortunately named) sRGB EIC61966-2.1, or left in its native Display ...
1
vote
0answers
27 views
Perceptually uniform alternative to HSV for optical flow visualisation
(I'm somewhat new to this, so please forgive me if there are errors in this question.)
In optical flow visualisation, where a vector field is visualised with colours, it is common to use the the Hue, ...
1
vote
1answer
46 views
Correcting monitor colors for CYMK printing?
Looking for some help with what i think is a monitor calibration issue.
My monitor is a Eizo EV2336W, system is windows 7, using adobe products (PS, etc), also have a datacolor sypder. Within color ...
1
vote
1answer
87 views
Is any quality lost when saving a flat RGB PSD as PNG?
Sometimes when I have a PSD I'm working on, and I flatten it and do an incremental save, I save as PNG instead of PSD because (1) the file can be opened even without Photoshop on another machine, (2) ...
3
votes
2answers
231 views
What is the difference between brightness and luminance? (HSB vs. LAB)
I've been trying to understand the difference between the brightness or value component (as part of HSB/HSV) and the luminance component (as part of LAB).
I've read this short article on xrite which ...
8
votes
6answers
2k views
Are spot colors limited and why CMYK mix is not treated same as spot color mix?
I read this article today. I understood a few things, but few remained unanswered.
The article mentioned 18 basic colors. The things little confused me after that line. I assumed Pantone have only 18 ...
2
votes
0answers
69 views
RGB to CMYK conversion of mid-grey colour
I have a logo which has been designed using RGB colours. Part of the logo is in grey and the colour use for this is a middle grey, R127, G127, B127.
Several online colour scheme generators convert ...
0
votes
1answer
61 views
Print: png or pdf? Size?
I am sure this question has been asked many times but I can't find it, here it is:
I am exporting from photoshop an image, 300dpi, I had set the image size at 2480x3508 px thinking it was A4, but the ...
3
votes
2answers
604 views
RGB and CMYK - what to expect when printing
I've designed some artwork which I originally planned to only print myself (on my home laser printer), and so I worked in RGB. I've since decided to do a print run in CMYK (outsourcing to a 4-colour ...
0
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0answers
23 views
AdobeRBG embedded profile still views as srbg when exported
I've got a problem I wanted some help with...
I've got a Cinteq 27qhd that has a default color space of AdobeRGB, so that's what I see everything in. Photoshop uses AdobeRBG as its default working ...
0
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1answer
124 views
Photoshop Color Management: Proof with Xerox Versalink C500 different from CMYK production printer?
I'm having a hard time getting accurate colors between calibration on my monitor; a Xerox C500 i'm using to proof, and the end result when sent to our production printer. I'm not sure exactly where my ...
2
votes
2answers
142 views
Chromaticity diagram
The chromaticity diagram is said to describe all colors visible to the human eye. However, I have also read that all visible colors are contained in a 3D color space – very similar to a cone – and ...
1
vote
2answers
112 views
Color scheme trasformations
Given a set of colors, say colors on this webpage, and another palette of an equal number of colors, what would be a good way to map the former to the latter while:
preserving contrast between ...
5
votes
2answers
630 views
Can I use recolor artwork feature in Ai to get this result (swap color of objects)?
See the image below. I need to do this thing. If you see, the positions of hands and diamonds are same in both parts, but there colors are swapped. I did this manually by picking each of them and ...
3
votes
3answers
90 views
Is there a well-distinguishable toric color space subset?
For a plot I want to represent two periodic angles with a single color. Theoretically this is possible, since a torus (think Doughnut, any surface point of which can be described via two angles) can ...
0
votes
1answer
65 views
List of ColorSpaces does not usually include PDF ColorSpaces?
Why a (complete) list of ColorSpaces, like the one in Wikipedia, would ignore the 11 color spaces used in PDF files?
Device dependent color spaces:
DeviceGray 2. DeviceRGB 3. DeviceCMYK
Device ...
2
votes
3answers
973 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
38 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
275 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
196 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
134 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
1answer
35 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
781 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
258 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
198 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
1k 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 (...
1
vote
3answers
818 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
276 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
3k 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
434 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
453 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
985 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
64 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 ...
2
votes
2answers
388 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
1k 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
52 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
568 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 ...
5
votes
2answers
172 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
104 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
554 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 ...
7
votes
1answer
1k 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
3k 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
2k 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
976 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
1answer
386 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
2k 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 ...
10
votes
4answers
757 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
169 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
1k 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 ...
