I saw this question some where, I think Reddit, but I can't find it. I have same issue. Please see the screenshot beneath. I've uploaded the PDF to mega.nz I'm using Adobe Acrobat Pro DC Version 2019.010.20064.

I'm trying to convert the book's default (C, M, Y, K) = (99%, 98%, 18%, 6%) (ie dark purple) to (90, 0, 90, 0) (green). After I click 'OK' and click 'Fix', Adobe Acrobat executes the fixup, but the color fails to change. Why?

enter image description here

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    $\begingroup$ Welcome. I don't know if this is the right site to ask this question since it is quite an application-specific one. Also, I don't think it is really a Computer Graphics problem or something that fits into one of the categories defined in the on-topic pages. A better place to ask this question is the Adobe Support Community. $\endgroup$ – wychmaster Jul 31 at 7:40
  • $\begingroup$ You will probably get a faster and more accurate answer there. $\endgroup$ – wychmaster Jul 31 at 7:40
  • $\begingroup$ @wychmaster thanks! i'll try it later $\endgroup$ – Dongmei Aug 11 at 2:50

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