Design walkthrough meeting on Thursday?
clown at utoronto.ca
Thu Jun 12 20:06:29 UTC 2008
Ian and Eli (et al),
Dojo has a page, written by Becky Gibson, describing a11y design
requirements for their designers and developers. Its purpose is to
provide tips for people who have little a11y knowledge, and to assure
them that a11y issues are not overly difficult (although there is still
work to be done).
The advice applies to the current discussion. Specifically, there are
tips regarding colour usage in the cases of colour blindness and high
contrast mode. A relevant quote:
> It tries to address color blindness issues where a person may not be
> able to perceive certain colors. It does *not* mean you can not use
> color! However, ... there must be enough contrast between the colors
> used for the difference to be apparent if the color itself can not be
It goes on to suggest how one can test quickly if one's colour scheme is
For the complete story, see:
Also, the page references Gez Lemon's site on colour contrast that
includes a table of example luminosity contrast ratios, where one can
quickly see whether the contrast is sufficient, and a luminosity
contrast ratio calculator, where you can enter a pair of colours and it
will advise if the contrast is good or bad.
Gez Lemon's site: http://juicystudio.com/services/coloursaferatio.php
Contrast ratio calculator:
Hope that helps.
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