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Color Contrast

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From: David Ashleydale
Date: Jun 3, 2009 10:25AM

I really love the Color Contrast
Checker<http://webaim.org/resources/contrastchecker/>;,
but I have a question about the WCAG 2.0 requirements. It mentions the font
sizes 18 point and 14 point. If I were to write this requirement in pixels,
should I use 24 pixels and 19 pixels, respectively? Point size seems to
depend on screen resolution. For 72 ppi, 14 point and 14 pixels are the same
size. But at 96 ppi, 14 point is closer to 19 pixels.

Does the WCAG 2.0 checkpoint mean to depend on the screen resolution in this
way? I'm working with our brand department on a color palette and I need to
let them know which text/background color combinations provide enough
contrast, but first they need to know what 18 point and 14 point mean.

Thanks,
David