ExcessibilityStorybook.Contrast (excessibility_storybook v0.1.0)

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What a foreground/background pair is good for, under WCAG 2 and APCA.

APCA tiers are the "Bronze simple mode" levels from the APCA docs: a minimum Lc for a kind of use, with the smallest font size/weight that use allows. They answer "how big does text in these colors need to be", which WCAG 2's two thresholds can't.

Summary

Functions

assess(fg, bg)
intended_pairs(tokens)

{foreground, background} name pairs where X-content is meant to sit on X (base-content sits on every base-N).

tiers()

Functions

assess(fg, bg)

@spec assess(ExcessibilityStorybook.Color.rgb(), ExcessibilityStorybook.Color.rgb()) ::
  map()

intended_pairs(tokens)

{foreground, background} name pairs where X-content is meant to sit on X (base-content sits on every base-N).

tiers()