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Accessible color and contrast for projected presentations


From: Sean Curtis
Date: Aug 31, 2014 3:18PM

Hi all,

In addition to web accessibility we're researching the accessibility of
slide decks for conference presentations for low vision users. We have a
gap in our knowledge here, and would really appreciate any input.

Our main question - WCAG contrast checkers (
http://webaim.org/resources/contrastchecker/) give a pass / fail for the
accessibility of colour combinations on computer screen. Are they also
accurate for the visual accessibility of slides presented on a stage? That
is, if a colour combination passes WCAG AA can we assume that is it ok for
a conference presentation?

Also, which is more visible for low-vision users - dark text on light
backgrounds or light text on dark backgrounds? I've heard this might depend
on how well-lit the presentation area is. Is it possible to give a
generalisation here?

Any other input on the accessibility of conference slides for low vision
users would be greatly appreciated.


Sean Curtis