Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

1
vote
1answer
36 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....
-3
votes
2answers
30 views

How to invert colors of a picture on Mac?

How to invert colors of a picture on Mac? I'm using macOS 10.13.
3
votes
2answers
107 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 ...
1
vote
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
votes
2answers
35 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 ...
1
vote
3answers
92 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 ...
0
votes
1answer
62 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
votes
1answer
78 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 ...
0
votes
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 ...
0
votes
3answers
113 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
vote
1answer
204 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
vote
2answers
100 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
vote
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
votes
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
votes
1answer
178 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
vote
1answer
51 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
votes
2answers
628 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
vote
3answers
417 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 ...
-2
votes
1answer
77 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
votes
0answers
114 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
vote
1answer
814 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
votes
1answer
964 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
583 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
vote
2answers
255 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
votes
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
votes
0answers
267 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
votes
1answer
122 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
vote
1answer
68 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 ...
1
vote
0answers
259 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
votes
2answers
141 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
votes
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?
1
vote
0answers
56 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
votes
1answer
1k 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
votes
1answer
494 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
vote
2answers
4k 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
votes
0answers
599 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
votes
2answers
290 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
vote
3answers
824 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
vote
1answer
539 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
votes
2answers
604 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 ...
-1
votes
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
votes
2answers
446 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
votes
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
votes
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
votes
1answer
1k 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?
3
votes
3answers
726 views

Why doesn't the Pantone Color Finder use same preview color for Coated and Uncoated?

Coated and Uncoated versions of the same Pantone color, if printed on the right paper, should (approximately) obtain the same perceived color. So, why does the official Color Finder on the Pantone ...
1
vote
1answer
171 views

Why would home printers work better with an RGB image

In @Scott's answer to this question Best format to save Photoshop artwork for printing?, he states that most home printers will more accurately reproduce the colors from an RGB image than a CMYK image....
1
vote
1answer
476 views

Colour management for logo design in Inkscape/Scribus

I’m new to graphic design and am unsure of how to manage colours in a logo I’ve just created. It’s black text (converted to paths) with one small graphical element (a leaf). I created it in Inkscape ...
-2
votes
1answer
44 views

Is there an online tool to change a color gradient?

I want to change the color gradient in this image from yellow to white or transparent. Is there an online tool that can achieve this in an easy fashion? Which online tool can I just that can achieve ...
2
votes
1answer
216 views

How to choose a PMS colour close to a certain CMYK value?

How do I get a Pantone (PMS) ink colour similar a specified CMYK colour? Is it possible that in some cases the PMS swatch chosen doesn't eactly match the CMYK colour? How would you go about this when ...