@BlueCat55 I'll add my 2p by agreeing with what you've been told. Home printers don't like CMYK, nor do many apps they might use to view. you asked - " in this case is it better to distribute the document in RGB? (And just be diligent about designing with colours that can be recreated in CMYK gamut?) Are consumer-level printers generally better at handling and managing RGB documents? ie. Is sending sRGB ICE61966-2.1 to a bunch of random destinations likely to cause fewer glaring colour problems than using a specific CMYK profile?"   yes  @Ton Frederiks & @D Fosse  are right   neil barstow - adobe forum volunteer, colourmanagement consultant & co-author of 'getting colour right' See my free articles on colour management Help others by clicking "Correct Answer" if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts     ... View more

My thanks to @rob day and @D Fosse (and everybody else who chimed in) for your comments. Very informative indeed. ... View more

Did Adobe do something about what?  Which post are you referring to exactly?  ... View more

Thank you! I didn't realize CMYK data could be treated that way (indexed)- that clears things up significantly.  ... View more

When Illustrator was developed, the idea was to specify color as RGB values with 6 digits. John Warnock listened to designers (like Luanne Seymour) and it became colors that could be defined in percentages of CMYK. As Jacob said, RGB was added later in version 7 (together with ICC color management). ... View more