Hello, I am using PDFBox and noticed that the color conversions were not always accurate for CMYK PDFs. I tested some examples and it seems like the default color profile used here <https://github.com/apache/pdfbox/blob/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDDeviceCMYK.java#L100> by PDFBox is not a very close match to *U.S. Web Coated (SWOP) v2 *(which can't be used directly for licensing reasons as per the in-code comment).
I have found that the icc profile here <https://github.com/saucecontrol/Compact-ICC-Profiles#cmyk> under creative commons CC0 license is much closer visually to *U.S. Web Coated (SWOP) v2*. WDYT about changing the deviceCMYK color profile? Or making it configurable at runtime? Here are a few examples that show the difference between these color profiles for page 2 of this <https://www.berwicktoyota.com.au/images/showroom/hiace-ebrochure.pdf> file (sorry I can't attach this PDF to the email due to 1MB size restrictions). The only change I made is the color profile referenced here <https://github.com/apache/pdfbox/blob/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDDeviceCMYK.java#L100> . With U.S. Web Coated (SWOP) v2 - as opened in Acrobat: [image: acrobat_screenshot_346x243.png] With ISOcoated_v2_300_bas.icc (used by PDFBox currently), screenshot taken from pdfbox debugger: [image: ISO_Coated_screenshot_from_pdfbox_debugger_1_346x243.png] With CGATS001Compat-v2-micro.icc (proposed change), screenshot taken from pdfbox debugger: [image: CGATS001_screenshot_from_pdfbox_debugger_1_346x243.png] Cheers, Etienne. -- ** ** <https://www.canva.com/>Empowering the world to design We're hiring, apply here <https://www.canva.com/careers/>! Check out the latest news and learnings from our team on the Canva Newsroom <https://www.canva.com/newsroom/news/>. <https://twitter.com/canva> <https://facebook.com/canva> <https://au.linkedin.com/company/canva> <https://twitter.com/canva> <https://facebook.com/canva> <https://www.linkedin.com/company/canva> <https://instagram.com/canva>
