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CMYK PDF export colors don't match Aphoto CMYK colors


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I'm trying to export a CMYK book cover done in Photo. When I export to a CMYK PDF, the book background color is wildly off. And I do mean wild. What am I dong wrong?

Even if I do an export of only the colored background, the color is still off, and I can't correct it, no matter what I do/try to get it the right color.

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6 minutes ago, Twolane said:

I'm not using and ICC Profile.

In the *.afphoto document you are exporting from, if you select Document > Convert Format / ICC Profile... what does it show for the current Color Format  & the current Profile?

I am not sure but I do not think it is possible for the document not to have any ICC profile.

All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
Affinity Photo 
1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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Document > Convert Format / ICC Profile

It says RGB8.

I ran it through all of the profiles. I don't know what I did, but it is now converting correctly. Being a rank amateur at this stuff, it sounds like I might have had a temporary bout of finger trouble. In my life, that is not unknown.

Thanks for your prompt response.

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52 minutes ago, Twolane said:

It says RGB8.

That is the Color Format but below that you should see an entry for the profile. You may have to scroll down to see which one is selected but one of them should be.

All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
Affinity Photo 
1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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Well, I thought I had it. I still can't change the background color. it's frozen in dark blue, and it exports to an off blue no matter the profile.

I've test exported all my other covers again. They export to PDF just fine. I'm able to set different CMYK values and change their background color if I want. The export to PDF settings are all exactly the same.

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When I bring down the Assign ICC Profile, it defaults to the bottom, sRGB IEC61196-2.1, as it does for all of my print book covers.

Fortunately, the cover is part of a series, so I brought over one that was working and I made the necessary changes.

No idea what went on with the one I couldn't get to work. I experimented quite a bit with the original, and couldn't find anything wrong. No problem, though. I have it working now.

I must have done something that broke the mold, so to speak. The mold is now working fine. It wasn't a big deal. It was just something that I couldn't get to work properly. I've been using the software to make print book covers for quite a while, and that's the first glitch I encountered.

The Affinity Trinity is great software. I'm so glad I discovered it.

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