All my colors appear muddy in In Design. They look fine in Photoshop and Illustrator. This happened recently. I think it started after I had a computer crash, I have an iMac and am using the El Capitan operating system. The crash occurred when I tried to update the system software. It was so bad that Apple had to walk me through reinstalling the system. Any thoughts as to what happened to my In Design display colors and what to do to fix it?
It sounds like you have some sort of transparency effect on your page, your colors are RGB, and your transpaperncy blend space is set to CMYK.
How do I fix it?
Figured it out. It was in the edit > color settings. I matched what the settings were in Illustrator, which was looking correct to my eye.