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Colors for the Color Blind [message #90035]

Fri, 16 January 2015 15:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

Paul Krummel has convinced me that even the color blind need to use
colors when they engage in data visualization. To help them out, Paul
has suggested a dozen specific colors and two additional color tables
that he finds helpful in this regard. You will find a discussion of this
topic here:

http://www.sron.nl/~pault/

I have added the 12 colors in the last line of Figure 3 in the reference
above. I have named the colors in the most unimaginative way as
CG1...CG12. You can find these colors in cgColor. And you can see the
colors in the last column of cgPickColorName:

void = cgPickColorName()

I have also added two color tables to the fsc_brewer.tbl file. These are
not strictly Brewer color tables, but I had already added a couple of
other useful color tables to that file and I saw no reason to establish
a new precedent. Paul called these color table "sunset" and "rainbow".
Since there is already a rainbow color table in IDL, I have named this
color table "cgRainbow."

The easiest way to update is to get a new version of the Coyote Library:

http://www.idlcoyote.com/programs/zip_files/coyoteprograms.z ip

Or, you can update the following files:

http://www.idlcoyote.com/programs/fsc_brewer.tbl
http://www.idlcoyote.com/programs/cgcolor.pro
http://www.idlcoyote.com/programs/cgpickcolorname.pro
http://www.idlcoyote.com/programs/cgloadct.pro

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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		Colors for the Color Blind By: David Fanning on Fri, 16 January 2015 15:42
		Re: Colors for the Color Blind By: Jim Pendleton on Fri, 16 January 2015 21:00

Previous Topic:	How to create a colour table in IDL?
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