On Wednesday, March 12, 2003, 10:36:50 PM, John wrote: JL> Rijk wrote on Wednesday, March 12, 2003 at 3:26:59 PM: >> Ian wrote: >>> In practice, in my six years of writing CSS tests, I cannot recall >>> receiving a single complaint from anyone who was blocked from using >>> CSS tests because of red/green colour blindness. >> I do have problems with 'maroon', which is used in some tests. I can >> hardly distinguish between maroon and black text color on a white >> background. Red text on a white background is better, but still not >> very easy. Distinguishing background colors, however, is no problem >> for me. And if a test says 'this text should be green text', I can >> see easily enough whether it is green or 'some other color, most >> likely black'. JL> I suspect the definitions of red and green were chosen carefully; red JL> is #ff0000 and green is #008000. There is a significant difference JL> between the two even if the colors appear identical (the difference JL> between #808080 and #404040 or something like that). That depends on which sort of red-green color blindness you have. JL> This distinction JL> is much easier to make with a background color than with a text or JL> thin border color--maybe the test writers should be encouraged to use JL> background colors wherever possible. I agree that large areas of color are easier to distinguish. -- Chris mailto:chris@w3.orgReceived on Wednesday, 12 March 2003 19:32:06 GMT
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