Questions tagged [color-conversion]

Questions about changing colors from one color space to another, most often to match the original color as closely as possible.

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1answer
38 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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0answers
20 views

Paint.net: How to change a heightmap from a red-green scale to luminosity scale?

I have a piece of software that exported a heightmap where the peaks are in a deep red, and the shallowest swamps are in deep green, with yellow in between, all on a smooth scale. If I convert to ...
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2answers
73 views

Converting an RGB image to CMYK with a specific black? (Photoshop)

I would like to convert a lot of RGB images to a CMYK where the black is 20, 20, 20, 100. By making a custom CMYK and using separation type GCR and 22% UCA I can get pretty close. But I can see on ...
7
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4answers
993 views

Converting from CMYK to RGB (to work with it), then back to CMYK

I am trying to make designs for printable products (shirts, mugs, phone cases, ...). I heard about the issue of the RGB and CMYK colors when printing. I am using Inkscape for my designs as it is a ...
0
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1answer
28 views

GIMP; Transfer source tonal/color profile to a second image

In GIMP, is there a programmatic/algorithmic way to transfer the color/tonal profile of one image to another when they have similar subjects? I have this image: And then this image: Similar ...
1
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1answer
50 views

Script: Change color Saturation while maintaining L in LAB model

For example, I have a red color #633b3d (Saturation: 40, L: 30) and I want to transform Saturation to 80 while maintaining L (resulting color should be #83211b). If I simply change foregroundColor.hsb....
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2answers
41 views

How to invert colors of a picture on Mac? [closed]

How to invert colors of a picture on Mac? I'm using macOS 10.13.
3
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2answers
187 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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0answers
21 views

Find color where alpha at value `a` equals a given hue [duplicate]

I want to achieve a certain hue but also have the color that carries that hue contain a certain opacity. For example if I were after #ff0000 with 50% opacity, the color I would want to identify is ...
0
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2answers
37 views

How to single out colors when adjusting the curves?

I am trying to edit the colors in this picture so that 1) the yellow letters in "Thomas Jr" pop out more. Currently they are too bright and disappear into the white background. 2) The white looks ...
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3answers
124 views

Can RGB screen color exist in real physical world?

For example the bright royal blue color; R0 G10 B220, HEX: #000ae1. I know this color cannot be printed nor painted. But can this blue color exist in the real world other than on a digital screen? For ...
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1answer
78 views

Preparing In Design facing pages bleed and color for print

Hi guys I have a problem with my printer complaining all the time that the images in my doc are RGB and bleeds are not good. Do you know how to check if all my images are Cmyk and how to set up bleed ...
0
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1answer
118 views

Why png image loses color? [closed]

I have provided the client a logo (black and white) for Instagram in png. According to the client when he uploaded png image, the black part of image changes to green. Can anybody tell me why this ...
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0answers
22 views

Color conversion - 3rd Party app is modifying color space

Overview: Ideally one would put in the color one wants (say 153,0,0) and get the same output but that's not what's happening. I'm working with a third part application that changes the opacity (I ...
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3answers
118 views

How to make this shade of white look less “dirty”?

I have a picture of a blanket: When I try to open up the Color Adjust panel on Sketch and try fooling around with the brightness and contrast, it makes some of the parts look overexposed. Is there a ...
1
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1answer
289 views

How accurate is pantone conversion in Illustrator and how should I send “Pantone References” asked by the printer?

I've been hired to do a big campaign that requires all sorts of permutations of an Illustrator design. Most recently, I was asked to make a banner. The printer wants my Illustrator file (no pdf) in ...
1
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2answers
112 views

Brand color not available in cmyk

I have my own brand but everything I have done so far has been rgb. I wanted to get started printing some business cards but the color that our brand uses isn't available in cmyk and turns into a very....
1
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2answers
105 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 ...
0
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3answers
69 views

How to remove color areas from an image?

How I can remove all color areas from an image? I don't mean desaturate. Desaturate turns color into gray. I want to turn any color into white, and preserve any existing grays and blacks. For ...
0
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1answer
224 views

How do I change color but keep tint in illustrator?

I have an illustration made of several parts. All parts are the same spot color (some Pantone color) but they are different in tint. I know that I can select them all and go to Edit > Edit Colors > ...
1
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1answer
58 views

Handling inversion on black and white photos in Photoshop

I'm looking to recreate a similar black and white effect to the dome in this casino token. It's the Capitol Building in Austin, Texas. I've looked at a variety of different images of the dome, in ...
2
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2answers
698 views

Converting Pantone to RGB

I need to convert my client's logo from Pantone to RGB. The first is Pantone 297. If I convert it to RGB, is it R130, G198, B226? How about the blacks? I am not sure what these percentages mean. ...
1
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3answers
473 views

Alternative formulae for CMYK to RGB conversion for display on screen

I am writing software to extract text sections from PDFs and render on screen for analysis; I need to display the text on screen in the colour from the document. When the PDF contains CMYK colours at ...
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1answer
121 views

Change a specific color in an area

I have this image, a PNG file: Question: I want to change one of the logo's color to be more visible than the others. The color I want is australium gold rgb(231, 181, 59) These "logo's" represent ...
2
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0answers
122 views

Color management: how do I make Gimp handle gamma conversion in this png file?

This image is shown as an apple in Gimp, although if gamma is handled correctly it should show a pear. What steps should I take in Gimp to make it handle the gamma correctly? I've tried with the ...
1
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1answer
923 views

How to find the CMYK or RGB value of a commercial paint color?

I have a client who has chosen a paint color for their office and they want to carry that exact color onto everything from signage to website to business cards as their "brand color". Is there any ...
0
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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 (...
1
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3answers
639 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 ...
1
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2answers
267 views

CMYK to PMS - which PMS color should I use?

I am developing brand guidelines for a particular sub-brand where I work. Certain details are specified with a rich black, which is a CMYK mix of C10, M10, Y10, K100. Mostly process printing will work ...
4
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1answer
433 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?
3
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0answers
280 views

Should you convert or only assign a color profile when wanting to preserve color appearance?

Context: I am preparing a design to be sent off to a professional printer. I will print the exact same design on both coated and uncoated paper, requiring FOGRA39 and FOGRA47 respectively. In ...
0
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1answer
132 views

Changing color using hue is creating unwanted border

I have an image with green and blue stones: I want to change all the green ones to be blue as well. Currently I'm following this tutorial: https://www.youtube.com/watch?v=n9fwiNyDHLI It says to: 1)...
1
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1answer
69 views

How to make a screenshot from Corel 2017, without converting through my monitor color profile?

My goal is to (temporarily at least) get reliable colour values on screen and in my screenshots, in CorelDRAW 2017 on windows. If I screengrab and paste into eg GIMP, the colours shift. I think what ...
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0answers
283 views

Adobe Illustrator | RGB vector looks all black when I import it to CMYK artboard [closed]

Colorful RGB vector I've downloaded from Vecteezy looks all black when imported to CMYK artboard. I can't change the color after importing to CMYK artboard either. How can I fix that? What I've done: ...
5
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2answers
151 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?
11
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1answer
2k views

Why is Photoshop changing my CMYK numbers?

I have my image mode set to CMYK. But as soon as I enter 0 C, 0 M, 0 Y, 50% K, it changes it 43% C, 35% M, 35% Y, 1% K. Attached is a screenshot. How do I remedy this?
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0answers
57 views

Why does Photoshop's color profile conversion change appearance when source and target profile are identical? [closed]

Recently, I've noticed something in Photoshop I cannot quite understand: I've got a Photoshop document (not a specific one) in e.g. sRGB, ICC-Profile embedded. Now, when using 'Convert to Profile' ...
0
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1answer
2k views

How to make Illustrator default to CMYK [duplicate]

How to make Illustrator default to CMYK. My color box says CMYK, but my swatches still default to RGB please help.
0
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1answer
508 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 ...
1
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2answers
5k views

delete half transparent pixels in image

I need to convert a 16bit png into an 8bit png for size reduction. Problem are the half transparent pixels that will generate a white border around my content when converting to 8bit. I just want to ...
2
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0answers
626 views

PDF Export: Color Profile Conversion (Affinity Designer)

I am new to AD and using the current version as trial. I worked for 10 years with Illustrator but would like to switch. I need to export a PDF/X-3:2002, but it seems there is only X-1a and X-3:2003. ...
3
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2answers
309 views

Looking to replicate a comic coloring of early 90s(not just using the half tone filter)

Here is my image with flat colors, colors with the halftone filter, and a comic page I am trying to replicate. I am missing something. My colors don't have the same look.I am using the same 64 color ...
1
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3answers
878 views

CMYK color difference from Windows to Mac

When I open an InDesign file and edit a linked PSD by changing the color mode CMYK, I see a difference from my Windows PC to my Mac. The other day I made a CMYK version of an PSD on a Mac and put it ...
1
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1answer
566 views

Changing colour mode of black in InDesign

I was under the impression that, to convert the colour mode of an InDesign document, you just had to modify Edit > Transparency Blend Space and change the colour mode of all swatches. But I've ...
3
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2answers
665 views

Colours being shown differently throughout web browsers and image editing software

In a web browser, this colour (#495D7A) looks like this: But in Photoshop, that colour looks like this and the dropper tool detects it as #495D7B: And when these colours are side by side. I've put ...
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1answer
2k views

How to convert a logo to grayscale in Photoshop?

I have a logo that has color gradients and I need to convert it to grayscale in Photoshop or in Illustrator and get a good result. I tried to convert my logo in Illustrator but the result is ...
3
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2answers
471 views

How to find the nearest color from a list of 9 in Photoshop?

I've a picture of an static object correctly balanced and exposed: I would like to sample the nearest color from my own palette of 9 RGB or Lab using Photoshop: Colour palette: #8270a4 #aa83cb #...
7
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7answers
2k views

Convert complex artwork into single color

I created this logo for a client, and I now need to convert it into one color versions (all black/all white). Because there are so many overlays of text and graphics, I am having issues changing it ...
5
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4answers
1k views

PMS vs CMYK Logo colors

So, I designed a logo in CMYK color and printed it using EPSON printer. The colors match perfectly what I see in print and on monitor. Then I convert the logo color to PMS using Illustrator's ...
-1
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1answer
2k views

Applying a limited palette to a photo [duplicate]

How can I apply a limited palette to a photo, while still keeping the value variations within the original image?