the “Gamut Warning” option

Question

Please add the “Gamut Warning” option when creating a book.
The other day, when I was creating a photo book, the metallic blue color didn’t come out right, so I asked Blurb Customer Support what the problem was, and they told me it was “out of gamut.”
In Photoshop, selecting the “Gamut Warning” option allows you to identify problem areas, but if such an alert were to appear during the book creation process, it would help resolve issues more quickly, so I would like to request that this feature be added.

[Moved to Lightroom Classic by a moderator］

Per Berntsen · Answer

Blurb uses CMYK printing presses, and Lightroom Classic doesn’t support CMYK.
The ability to soft proof with CMYK profiles was introduced in version 6, but removed in version 6.2 (I think) because there were issues with it.
There is probably an existing feature request for CMYK soft proofing where you can add your vote, do a forum search for it.

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