What is the formula to convert a color in CMYK to hex?

Question

What is the formula for converting a color encoded in CMYK to its hexadecimal equivalent?

Answer 1

I have bad news for you: there is no simple formula. Cyan, magenta and yellow are complex ink colours and the translation to RGB depends on colour profiles. To make things worse, the CMYK colour space is smaller than the RGB colour space. Some pointers on colour theory:

• handprint: do "primary" colors exist?
• Plotting colors properly on a computer screen