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mrstrongarm
mrstrongarm
Participant
April 13, 2026
Answered

Is it possible to convert a PDF to PDF/X-3 in Acrobat and retain the RGB colors of the original file?

I want to submit a children’s book (bright colors) to Amazon KDP. All pages created in RGB. 

I used Acrobat to create a combined PDF of all the interior pages. It looks to me like all the RGB colors were retained-- which is what I wanted.

I need to save the file in PDF/X format. I’d like to save it as a PDF/X-3 because I’ve read that you can retain RGB colors in the PDF/X-3 format (as opposed to PDF/X-1a which forces CMYK).

But I can’t seem to make this work in Acrobat. When I try to create the PDF/X-3, Acrobat forces me to choose a PDF/X-3 conversion profile that converts the colors to CMYK-- at least it sure looks that way because the colors in the resulting PDF/X-3 are MUCH DULLER than the colors in the original file.

Any suggestions? How do I create a PDF/X-3 and somehow retain RGB color??

    leo.r
    leo.rCorrect answer
    Community Expert
    April 22, 2026

    In Acrobat preflight, it’s clearly stated that a PDF/X-3 conversion will convert colors to CMYK:

     

     

    So yes, the info is conflicting (especially since the PDF/X-3 standard itself does seem to allow RGB).

     

    Try PDF/X-4 (I think it should preserve RGB, not sure).

     

    Also, if you’re on Mac you can save PDF to generic PDF/X-3 from Preview. I doubt it converts colors to CMYK.

     

    Also, I wonder if Amazon KDP doesn’t provide instructions how to save files for them?

     

    View reply

    5 replies

    Anand Sri Bhattacharya
    Community Manager
    Anand Sri BhattacharyaCommunity Manager
    Community Manager
    April 20, 2026

    Hello ​@mrstrongarm 

     

    I hope you are doing well, and thank you for reaching out.

     

    Please note that Acrobat cannot create a true PDF/X‑3 file that preserves RGB colors end‑to‑end in the way you expect.
    What you’re seeing (colors becoming dull / converting to CMYK) is expected, standards‑based behavior when using Acrobat to convert to PDF/X.

     

    Please check these documents for more details: https://helpx.adobe.com/acrobat/using/color-profiles.html

    https://helpx.adobe.com/in/acrobat/using/color-managing-documents.html

     

    I hope this helps.

    Regards,

    Anand Sri.

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      mrstrongarm
      mrstrongarmAuthor
      Participant
      April 22, 2026

      Hi Anand Sri,

      Many thanks for your kind reply. Very disappointing, but it does confirm my own experience, namely: that converting a PDF to a PDF/X-3 will NOT preserve RGB colors, but will, in fact, convert them to CMYK.

      Thanks, too, for the links, but that second document contains a statement that's either flat-out wrong, or very misleading. Here’s the statement:

      “(PDF/X‑3) Does not convert colors. Use this method when creating a document printed or displayed on various or unknown devices. When you select a PDF/X‑3 standard, color profiles are automatically embedded in the PDF.”

      That directly contradicts my experience: embedding profiles DOES cause RGB colors to be converted to CMYK in the resulting PDF/X-3. Maybe the above statement is correct in some technical sense, but it’s very misleading to a layman like myself. FWIW.

      Thanks again.

      Cheers, Mark

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      Mark Armstrong
      leo.r
      Community Expert
      leo.rCommunity ExpertCorrect answer
      Community Expert
      April 22, 2026

      In Acrobat preflight, it’s clearly stated that a PDF/X-3 conversion will convert colors to CMYK:

       

       

      So yes, the info is conflicting (especially since the PDF/X-3 standard itself does seem to allow RGB).

       

      Try PDF/X-4 (I think it should preserve RGB, not sure).

       

      Also, if you’re on Mac you can save PDF to generic PDF/X-3 from Preview. I doubt it converts colors to CMYK.

       

      Also, I wonder if Amazon KDP doesn’t provide instructions how to save files for them?

       

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