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:In some browsers you may need to click the "back" button more times than expected.
:The relevant accessibility guideline is at [//www.w3.org/TR/WCAG20/#visual-audio-contrast WCAG 2.0 section 1.4]. note that whilst Level AA is mandatory, level AAA is optional. --[[User:Redrose64|<span style="color:#a80000; background:#ffeeee; text-decoration:inherit">Red</span>rose64]] 🌹 ([[User talk:Redrose64|talk]]) 20:51, 23 October 2023 (UTC)
::Unfortunately WCAG 2.x contrast is not accurate, and that Snook page even references the WCAG 1 methods which are even more bizarre. In full disclosure I am working on the new future methods, [https://www.myndex.com/APCA/ APCA] and the [https://readtech.org/ARC/ APC-Readability Criterion]. If you want a WCAG 3 checker, I suggest STARK, they have a free web extension.
::As an example, WCAG claims that text in the red box is 6.45:1, nearly the high AAA level. Personally, I can' read it that well, and those with protanopia probably can't read it at all. I tested it ina clinically accurate protan simulator, and it's very hard to make out, yet WCAG rates it highly. APCA on the other hand rejects it as inaccessible... <span style="border:1px solid #30a;border-left:0;border-radius:20px;padding: 0;background:#eef">[[User:Myndex|<span style="border-radius:22px;padding:3px 7px;background:#30a;color:#def;">Myndex</span>]] [[User talk:Myndex|talk]] </span> 12:57, 30 October 2023 (UTC)
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