PUBLIC MARKS with tags WAI & w3c

Le W3C a publié le 27 mars 2012 un « early draft » d’une méthode harmonisée d’évaluation des sites web. Bonne nouvelle, en apparence, mais on y trouve une petite phrase de rien du tout, qui pourrait bien s’avérer lourde de conséquences.

The Colour Contrast Check Tool allows to specify a foreground and a background colour and determine if they provide enough of a contrast "when viewed by someone having color deficits or when viewed on a black and white screen"

better color checker

The objective of this technique is to make sure that users can read text that is presented over a background. For Success Criterion 1.4.3, this technique describes the minimum contrast ratio for text that is less than 18 point (if not bold) and less than 14 point (if bold). For Success Criterion 1.4.5, this technique relaxes the 7:1 contrast ratio requirement for text that is at least 18 point (if not bold) or at least 14 point (if bold).

with the formula and advices