# CMYK colours changing

If I draw a coloured diagram like Graphics[{CMYKColor[0, 0.83, 1, 0], Rectangle[{0, 0}], CMYKColor[1, 0, 0, 0], Rectangle[{0.5, 0.5}]}] and select the red rectangle using Drawing Tools Colours, it gives a different colour than I originally input.

When I exported the image as an eps and opened it in Illustrator, the red was back to [0,0.83,1,0]. Why are the colour sliders in Mathematica giving a different value?

• Try CMYKColor[0, .83, 1, 0]? I can't seem to reproduce your image here, strangely... – cormullion Sep 23 '13 at 22:41
• @cormullion Sorry, I typed my example wrong but still have the same issue. I'll update the question. – keystonethewizard Sep 23 '13 at 23:19
• Ah, I see what you're doing now - you're displaying the system color picker to sample the RGB screen colour. I couldn't work out how to display the picker from Mathematica's drawing tools... :) – cormullion Sep 24 '13 at 10:55