[metapost] defaultcolormodel

Dan Luecking luecking at uark.edu
Wed Jul 13 21:28:40 CEST 2011

At 09:37 AM 7/12/2011, Stephan Hennig wrote:

>OK, thanks!  While I cannot see a difference between (0,0,0) and
>(0,0,0,1) in GSview,

When outputting to a RGB device (such as a screen) GS converts
cmyk to rgb for display.

>in Adobe Reader CMYK black is indeed greyish.

Adobe Reader, on the other hand tries to get cmyk colors on
screen to match what a color printer would show on paper. My
impression is that cmyk colors tend to get muted, as if gray
were mixed in.

Of course cmyk is a color system intended for print and I feel
it is (up to a point) pretty much irrelevant how the colors
display on screen. The success of AdobeReader's efforts at
matching colors is very much dependent on both the screen and
the printer. When I need high quality color, I view on all
screens at my disposal (3 of them) and print on all printers
I have free access to (2). There is always some variation and
all I can do is make sure the worst is good enough.


Daniel H. Luecking
Department of Mathematical Sciences
Fayetteville, Arkansas

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