Contrast is king! Use a minimum contrast ratio of 4.5:1 for text to ensure readability for all. #accessibility #a11y - ThreadSky

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geoffreycrofte.bsky.social • 32 days ago

Contrast is king! Use a minimum contrast ratio of 4.5:1 for text to ensure readability for all. #accessibility #a11y

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gautier.dev•32 days ago

Use a modern contrast algorithm (like APCA) instead of WCAG2 for more accurate results! https://www.myndex.com/APCA/ 🎨

geoffreycrofte.bsky.social•32 days ago

Nope. This algorithm didn't go through enough testing and has been removed from WCAG 3.0 plans because the author of the algo don't want to go through these testing, because ego I suppose. (Short story)

So no. No APCA until user testing says so.

gautier.dev•32 days ago

Oh too bad, it was exciting to have a computation that acknowledged the difference between light on dark and dark on light

geoffreycrofte.bsky.social•32 days ago

A bit of reading of some reason why this isn't enough.

Light perception is all about context.

https://www.creativejuiz.fr/blog/en/user-experience/there-is-no-myths-of-color-contrast-accessibility

Having a 2-color comparison with the notion of perception will never be enough. You need a third. The context.

gautier.dev•32 days ago

Ooooh, very interesting, thank you! Any chance we see context coming in an upcoming WCAG?

geoffreycrofte.bsky.social•32 days ago

Honestly I don't know 😅
I just know that color and perception is a complexe thing that both WCAG algo and APCA algo didn't solve yet.

But at the moment, WCAG is still the official standard 😊

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