- From: Lois Wakeman <lois@lois.co.uk>
- Date: Thu, 1 May 2003 10:27:56 +0100
- To: <w3c-wai-ig@w3.org>
- Cc: <immelie@hotmail.com>
Many thanks for everyone who has taken the trouble to post some interesting responses to my enquirer's questions. To sum up in a sentence, we have two checkers (I only knew of the first before), and particular practical problems seem to be colour codes for electrical wiring and components, and use of red/green or red/black to distinguish items on screen and in the physical world. To these, I can add my own example from the olden days when editors used a red and black biro taped together to correct galley proofs. My friend Gordon is colour blind, and cannot tell the difference between red and black, as has already been mentioned by others. So, he used a green and black biro pair, to the confusion of the printers, who expect markup to be in red. > http://www.vischeck.com/vischeck/ > http://colorfilter.wickline.org/ Of course, following WAI guidelines, we never use colour only to distinguish things, do we? <G> Anyone wanting more technical info on the physical basis and effects of the condition might find this link useful: http://www.firelily.com/opinions/color.html Lois Wakeman ------------------------------------------------------ http://lois.co.uk http://siteusability.com http://communicationarts.co.uk ------------------------------------------------------
Received on Thursday, 1 May 2003 10:51:19 UTC