Florida’s Alligator on Vintage Bloom
#664422 on #c0b0d0
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
4.29:1
Large text only
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc 48.2
Clears Lc 45 — large or heavy display text.
Dark text on a lighter ground.
Colour difference
ΔE00 49.1
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#63411f is the nearest colour of the same hue that passes AA on #c0b0d0, at 4.50:1. Only the lightness moved — which is the point: your colour stays recognisably your colour.
And to someone missing a cone
protanopia
Ratio 4.51:1, ΔE00 52.5.
deuteranopia
Ratio 4.19:1, ΔE00 50.7.
tritanopia
Ratio 3.77:1, ΔE00 38.9.
The weakest of the three is tritanopia, where the two are ΔE00 38.9 apart against 49.1 for a trichromat — still clearly two colours.
Both colours have pages of their own: Florida’s Alligator ·Vintage Bloom · the same pair the other way round ·all pairs