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Color Contrast Formula

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From: Tim Harshbarger
Date: Mar 15, 2005 9:53AM

Hi,

Would someone be willing to explain the color contrast formulae
mentioned in this document?

http://www.w3.org/TR/AERT#color-contrast


The color brightness formula seems straightforward. We are not so
certain about the color difference formula. What is meant by max and
min values?

Thanks!
Tim