When I put a a color hex #ff00ff inside Ai, the hex number stays the same but the color gets darker and less neon. I've checked and the document was created in RGB mode, and I switched to CMYK and still have the same issue.

You can see an example of the correct color versus darker in the screenshot below:

here is #ff00ff properly displayed:

enter image description here

Here's how it renders when I use the same code in illustrator:

enter image description here

  • If you switched from CMYK to RBG color mode for the document setup, you need to reassign the color. By default, switching color modes does not update colors to match the new mode when going from CMYK to RGB.. – Scott Aug 21 '20 at 21:36
  • It sure does look like #ff00ff converted to CMYK. Your File > Document Color Mode is set to RGB Color? And you haven't got View > Proof Colors checked? And your object has basic appearance with no effects or blend modes applied? You are not clicking the Out of Gamut Warning button? Does this happen in every new RGB document you create or only in this particular one? – Wolff Aug 21 '20 at 21:58
  • Take a full screenshot of your illustrator. Thatway we can eliminate the obvious cases. – joojaa Aug 23 '20 at 14:30

A guess: You have proof colors "ON" and you simulate some CMYK printing process, no matter your document has color mode = RGB:

enter image description here

Switch View > Proof colors OFF if you are not interested in the look of CMYK print (sRGB ff00ff isn't a printable color in common CMYK printing processes)

BTW People pay to Adobe a substantial amount of money because Adobe's programs can predict what CMYK printing processes will output. If you are going to let a CMYK print house to print something you should also learn how to properly use color management.

  • I'm afraid that is not the issue. It was already set to OFF. – user2684452 Aug 21 '20 at 21:28
  • I wrote "A guess" because we know nothing of your color settings, proof color settings nor full document structure (= fill colors of the objects, layers, blending modes, opacity) Do not expect more than guesses without giving more info. – user287001 Aug 21 '20 at 21:34

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