Black Sabbath on Nickel
#220022 on #929292
Body text at this size
And the smaller size most interfaces actually use for paragraphs — the size that decides whether a pair is usable.
Caption text, which almost nothing passes.
WCAG 2.1
6.19:1
Passes AA for body text
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc 44.9
Clears Lc 30 — the floor: below this the draft considers text not readable at any size.
Dark text on a lighter ground.
Colour difference
ΔE00 48.6
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #220022 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 6.39:1, ΔE00 47.6.
deuteranopia
Ratio 6.08:1, ΔE00 45.7.
tritanopia
Ratio 5.89:1, ΔE00 44.4.
The weakest of the three is tritanopia, where the two are ΔE00 44.4 apart against 48.6 for a trichromat — still clearly two colours.
Both colours have pages of their own: Black Sabbath ·Nickel · the same pair the other way round ·all pairs