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.

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51 views

Is there a name/formulae for the hue-circle scaling Adobe is using with “Kuler”

It's not immediately obvious, but when you visit Adobe Color aka "Kuler", you'll notice that the hue of the color-circle is not evenly spaced: As you can see in the image above, a regular hue spacing ...
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0answers
9 views

Saving as SVG changes the appearance of a color with the same color profile

I used LiveTrace on a raster image and saved it as AI in CMYK with Working CMYK: U. S. Web Coated (SWOP) v2 as the color profile. Then I save it as SVG, and save it back as AI, and change the color ...
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24 views

Colors Issue with CMYK/8 in Photoshop

I want to invert and replace colors in an image: More precisely, the objective is to incorporate it in a dark grey CMYK/8 .AI file with the following background color: Usually, I open the image in ...
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0answers
19 views

Krita - any color space settings/profiles that allow me to have this as Chunk data in the output PNG file?

I analysed the chunk data of a PNG image(unknown source): In Krita, is there the possibility to export a PNG with these types of chunk information directly in the export process? (gAMA, file gamma ...
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0answers
33 views

Web Safe AND CMYK (U.S. Web Coated v2) swatch

I was curious if there such a thing exists such as a swatch of the intersection set of web-safe and cmyk compliant colors? Is there an adobe swatch library for this? My reasoning being to limit myself ...
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1answer
22 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?
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1answer
43 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 ...
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0answers
29 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, ...
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1answer
47 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 ...
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1answer
110 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) ...
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2answers
365 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 ...
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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 ...
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0answers
95 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 ...
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1answer
62 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 ...
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2answers
812 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 ...
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1answer
143 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 ...
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2answers
153 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 ...
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2answers
113 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 ...
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2answers
650 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 ...
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3answers
92 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 ...
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1answer
72 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 ...
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3answers
1k 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 ...
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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 ...
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2answers
290 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, ...
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0answers
200 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 ...
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2answers
140 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 ...
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1answer
38 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 ...
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3answers
905 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 ...
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2answers
289 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 ...
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2answers
206 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 ...
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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 (...
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3answers
902 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 ...
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1answer
348 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?
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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
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1answer
435 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?
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3answers
509 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 ...
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7answers
1k 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
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1answer
65 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
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2answers
452 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 ...
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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 ...
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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
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5answers
623 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 ...
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2answers
177 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?
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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 ...
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1answer
598 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
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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-(...
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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,...
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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 ...
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1answer
1k 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?
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1answer
425 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 ...