Calculate contrast ratio of two given #RRGGBB strings.
#RRGGBB
Also ported to ContrastRatioValidator.php.
ContrastRatioValidator.php
http://www.w3.org/TR/WCAG20/#contrast-ratiodef
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Calculate contrast ratio of two given
#RRGGBB
strings.Also ported to
ContrastRatioValidator.php
.http://www.w3.org/TR/WCAG20/#contrast-ratiodef