[thelist] cmyk color to web
aardvark
roselli at earthlink.net
Thu May 31 02:50:49 CDT 2001
> From: viveka <me at karmanaut.com>
>
> It's not free, but you probably already have it:
> Photoshop will do this.
[...]
it's worth noting that your color profile can affect what numbers you
get... depending on how you have your system calibrated...
given that, Photoshop is still a good way to go, but since the
original post also asked about Pantone, color profiles will have a
greater effect there, since it has to be converted twice (Pantone ->
CMYK -> RGB)...
if you have a Pantone to process book around, grab the CMYK
equivalents for the Pantone color from that book, and type those in
to Photoshop...
also, keep in mind that RGB and CMYK have different color
gamuts, and given their very nature (additive vs. subtractive), you'll
find you just won't get the colors you want (especially as you
wander from machine to machine to eyeball it)... Photoshop will
warn you (via a little alert icon in the color choose) should you pick
a color that is out of the other space's gamut...
of course, you could do the conversion through LAB to get the
greatest control, but given the output method (some dude's
miscalibrated monitor, multiplied by a million users), that would
just be silly...
good tutorial on RGB/CMYK from Adobe, note the last image on
the page:
http://www.adobe.com/support/techguides/color/colormodels/rgbcm
y.html
good color talk, including good gamut chart:
http://www.wideopenwin.com/wtp/color.htm
quick description of RGB vs. CMYK:
http://marvin.mrtoads.com/rgb_vs_cmyk.html
images of the differing gamuts (mostly CMYK):
http://www.idea-digital.com/knowledge/colourspace.html
don't let your client hold the color swatch up to the monitor... and if
you have one of the silly Pantone Web Swatch books around, burn
it and pretend you never bought it...
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