Re: Weird colours?

In article <dh0nip$d65$1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"honest joe" <honestjoe@xxxxxxxxxxxxxxxx> wrote:

> Anybody got any idea about this. I took digital shots of children starting
> school last week. They were perfect on my PC. When I got them processed,
> some of the uniforms came out purple instead of blue! On closer examination,
> it was only knitted jerseys and cardigans that came out purple.

Yes, that sounds about right.

Your digital camera shoots pictures in RGB; it simulates a full range of
color by combining red, green, and blue light.

A printout, of any sort, can not use RGB; prints use CMYK (cyan,
magenta, yellow, and black inks) if they are made on an inkjet or color
laser printer, and CMY (cyan, magenta, and yellow) if they are made on
photographic paper.

There are many colors you can get in RGB that are not possible in CMYK
or CMY. In particular, vivid blues can not be reproduced in CMYK or CMY;
they tend to get flat, lose saturation, and turn purple.

If you take your digital image in Photoshop and convert it to CMYK,
you'll probably see the same thing happen on your screen--the bright,
saturated blues will turn flat and purple.

You can fix this problem; Photoshop offers many powerful color
correction commands, if you learn how to use them. If you use the
Selective Color command to decrease the amount of magenta in your blues,
the blues will not turn purple when you have your prints made.

--
Art, photography, shareware, polyamory, literature, kink:
all at http://www.xeromag.com/franklin.html
.

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