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Color swatch changes by Illustrator – Color profile issue

Community Beginner ,
Apr 17, 2020 Apr 17, 2020

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Hi Adobe Support,

6 month ago, I created a 2 color logo in Ill. 2019. For both colors I created a CMYK swatch which has the correct color values. My color profile is ISo coated v2. After upgrading Illustrator to 2020 I opend the file and it told me that the assigned color profile now is US Web coated. I have 3 choices to proceed. If I choose to change colors into my normal ISO coated v2 profile, Illustrator changes the swatch color values from 100/0/100/15 to 97/1,37/92,25/4,8. Why would the color swatch value change if the color profiles (both CMYK) change? Any Ideas?

Kind regards, Katja

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Community Expert ,
Apr 17, 2020 Apr 17, 2020

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If you do not want your color values to change (converted), choose "Use the embedded profile (instead of the working space). 

Check your Edit > Color Settings and make sure that the working space is still your ISO profile.

If that is the case, a different profile was used (or has been assigned) for the file you want to open.

Converting between (CMYK) profiles will always result in different color values. Because you will convert from CMYK (4 colors) to Lab (3 color components) to anothe CMYK (4 color components).

 

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Community Beginner ,
Apr 18, 2020 Apr 18, 2020

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Thanks for the reply 🙂 I am using Illustrator for more than 20 years and never had this issue. On opening the document with the wrong color profile, I choose to switch the profile to ISO_Euroscale – the colors change. If I don't change the profile and open the dokument, the colors stay as they should. Then, I change the profile to ISO_Euroscale, the colors also don't change. Is it the same process with 2 different outcomes? 

 

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Community Expert ,
Apr 18, 2020 Apr 18, 2020

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On opening the document with the wrong color profile, I choose to switch the profile to ISO_Euroscale – the colors change.

If you switch the profile on opening, you will convert the document profile to the current working space profile and that will change the color values.

If I don't change the profile and open the document, the colors stay as they should.

The color values (numbers) stay as they were, no conversion takes place, but the color appearance may be (more or less) different. The values are displayed as if they were entered with the current working space profile. 

Saving a document with an unchanged profile will keep the original profile with the document.

Then, I change the profile to ISO_Euroscale, the colors also don't change. Is it the same process with 2 different outcomes? 

If you Assign a profile you don't change the color values (numbers) but tell Illustrator to use those numbers with a different profile. which can change the color appearance which may not be noticeable when you switch between 2 different Euro  CMYK profiles. 

Saving a document with an assigned profile will save that profile with the document.

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New Here ,
Aug 08, 2023 Aug 08, 2023

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How to preserve color values for CMYK and RGB color samples while changing color modes in Illustrator? The issue is that, for example, if I'm in CMYK color mode and I have a CMYK 100K color sample, when I switch to RGB color mode and then switch back to CMYK, the CMYK 100K sample doesn't return to its original 100K value; instead, it changes to C74.61 M64.06 Y62.5 K80.47. This is unacceptable as color values shouldn't change when switching color modes. How can this be prevented?

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Community Expert ,
Aug 08, 2023 Aug 08, 2023

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You cannot avoid changing color values when converting from a 4 color model to a 3 color model.

Many CMYK values can be represented by the same RGB value and the same RGB value can be represented by different CMYK values.

It depends on the RGB and CMYK color profiles used.

See:

https://helpx.adobe.com/illustrator/using/color.html

https://helpx.adobe.com/acrobat/using/keeping-colors-consistent.html

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New Here ,
Aug 08, 2023 Aug 08, 2023

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It's just that in my opinion color samples shouldn't be allowed to change. These values should be what I assigned them... it's not that I don't understand what conversion means. The point is that when I assign certain values to the samples, they do not have the right to change to other colors in the samples panel. Dot. The conversion can be done on the object itself, but never on samples.

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Community Expert ,
Aug 08, 2023 Aug 08, 2023

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There are only 2 document color modes in Illustrator. RGB values do not exist in a CMYK document and CMYK values do not exist in an RGB document.

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New Here ,
Aug 08, 2023 Aug 08, 2023

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I'm really advanced in graphics and I really understand everything. Thank you for your help, but I don't think you understand me... There is nothing I don't understand about color space. I'm just saying that no matter what color mode I have, the values in the samples shouldn't change. If I transfer a color from a saved swatch to working swatches, the value from the saved swatches should always stay the same regardless of the mode change. Color change - conversion should happen at the object level, not at the sample level.

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New Here ,
Aug 08, 2023 Aug 08, 2023

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In other words, I'd like to be able to save the swatch color data for CMYK and RGB at the same time. Manually. So that these values never change according to how the illustrator calculates it. For example, if I have a sample that has: C0 M0 Y0 K100, then for RGB I want a target value of #000000. And I want it to always be like this. If I change the color mode from CMYK to RGB, let it use the value #000000. If the same color is used with CMYK color mode. The value is to be C0 M0 Y0 K100. Instead, illustrator forcefully converts my predetermined value to C79 M84 Y60 K87. Which is completely pointless.

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Community Expert ,
Aug 08, 2023 Aug 08, 2023

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Just have the numbers but not being able to use them does not seem very usefull to me.

That is how Illustrator works, unlike InDesign where you can mix RGB and CMYK in a single document.

But you can make a feature request here:

https://illustrator.uservoice.com/

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