Belladonna on Porcini
#220011 on #d9ae86
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
9.62:1
Passes AA for body text
AAA too. Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc 63.7
Clears Lc 60 — headlines and other larger text.
Dark text on a lighter ground.
Colour difference
ΔE00 64.9
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #220011 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 9.37:1, ΔE00 63.4.
deuteranopia
Ratio 9.74:1, ΔE00 65.0.
tritanopia
Ratio 9.88:1, ΔE00 68.0.
The weakest of the three is protanopia, where the two are ΔE00 63.4 apart against 64.9 for a trichromat — still clearly two colours.
Both colours have pages of their own: Belladonna ·Porcini · the same pair the other way round ·all pairs