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.
173
questions
2
votes
1answer
38 views
Checkerboard background is transparent but doesn't have alpha channel?
I've had a hard time to understand what is the relationship between transparent and alpha channel in Photoshop for a PNG image, I have this screen shot you can see I have a checkerboard background ...
0
votes
0answers
36 views
ghostscript creates sRGB not CMYK PDF file
Problem
Following recommendations from a variety of discussion (see below), I have attempted to use ghostscript to convert a PDF file in an sRGB colorspace (generated by Inkscape) into a PDF/X-1a file,...
1
vote
2answers
81 views
Color management between different pieces of software
I don't know much about color management even though I read a lot about it today. I know a computer needs calibration in order to render colors accurately, but as an amateur, I don't have the tools or ...
0
votes
0answers
25 views
Which fractal generators can render in the Adobe RGB color space?
I want to try generating fractals, viewing them on a BenQ SW270C monitor (which can view Adobe RGB color space) and then photo-print on art paper. I've previously used Apophysis and Fractorium -- they ...
0
votes
2answers
107 views
Mapping 3D RGB color-space to 1D Visible light wavelength
I wonder how to make a 1-to-1 mapping between the 3D RGB color-space and 1D visible light wavelength (nanometers)? I have shown their images below:
I mean if I want to know what is the RGB color that ...
0
votes
1answer
62 views
Color correct to counter low blue light
Everytime I create a video,it looks good in a normal screen but considering half of the people have the low blue light effect enabled, I would like to balance somehow the colors of my videos to ...
0
votes
2answers
78 views
Change in colors on different screens
So, I created a project in Illustrator and when I uploaded it on Behance the color appeared way off on my mobile, like the pinks changed to browns.
It's appearing fine on my MacBook screen but in all ...
25
votes
5answers
5k views
How can I detect if a color is gray
I'm trying to programatically detect if a color is "gray" or not.
The best measure of "grayness" I could find was the saturation. The problem that I'm running into is that ...
-1
votes
1answer
84 views
How do I get the HTML hex color corresponding to a color on screen?
I need to render rectangles in HTML/CSS that exactly match rectangles in PowerPoint. How do I get the hex color code?
Presumably the Mac Digital Color Meter Tool is the tool for the job. But me and ...
0
votes
1answer
280 views
How to find a color within area in CIE 1931 color space
Color should fall within an area defined with coordinates in CIE 1931 color space as stated in CIE 39.2 - "Recommendations for Surface Colours for Visual Signalling".
The area is described ...
0
votes
0answers
31 views
Getting all color modes from a shape in illustrator
Is there a way to get all color mode values (or at least the basic ones) from a shape in automatic mode? What I mean is to get the RGB, HEX, CMYK and gradient info in an automatic way (kind of ...
0
votes
1answer
122 views
YCrCb colorspace: why does it contain only blue and red color information, but not green?
I was reading about YCrCb colorspace.
First channel, Y is "luminance" (akin to the brightness) of the pixel.
Second channel, Cb is the "chrominance" (aka color) for blue.
Third channel, Cr, is the "...
0
votes
0answers
30 views
PPM wrong color display
I get weird results when displaying a PPM:
(this is actually an upscaled PNG)
And here's what the file looks like:
The dimensions are fine (10 rows, 8 columns), just the colors are wrong (or am I ...
0
votes
2answers
56 views
Where to find or how to make large harmonious color palettes?
For a website, I have a list of some 500-1000 items. I would like to display them individually with(in) e.g. a colored card but also as combinations of 2 up to ~5 items/colors. So, if I would display ...
1
vote
1answer
155 views
Gray values different between grayscale and RGB color modes?
I'm trying to understand the different numbers I get when I convert an image from grayscale to RGB or vice versa. I'm only working with grayscale values at the moment as I'm working on a heightmap but ...
2
votes
0answers
50 views
How to make truly additive āAdditionā layer modes? [closed]
This image summarises my mathematical struggles with the seemingly simple rule of āAdditionā layer modes in different graphics applications (tested with GIMP and Inkscape). Since the greyscale layers ...
2
votes
1answer
161 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 ...
0
votes
0answers
18 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 ...
0
votes
1answer
32 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 ...
0
votes
0answers
156 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 ...
1
vote
1answer
24 views
What do you call (S×V) in the HSV color model?
What do you call the quality of a color being āvivid,ā or in other words, the quality of a hue being distinct and recognizable? Mathematically speaking, what do you call (SĆV) in the HSV color model?
0
votes
1answer
770 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
72 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
65 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
326 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) ...
4
votes
2answers
1k 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
220 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
282 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
2k 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
votes
1answer
244 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
211 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 āĀ very similar to a coneĀ ā and ...
1
vote
2answers
121 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
705 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
105 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
113 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 ...
3
votes
3answers
2k 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
39 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
363 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
233 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
195 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
40 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
1k 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
357 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 ...
3
votes
2answers
234 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
2k 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
1k 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
668 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
4k 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
438 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?
