Memorial Black on Corrosive Green
#091101 on #54d905
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
10.35:1
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 68.9
Clears Lc 60 — headlines and other larger text.
Dark text on a lighter ground.
Colour difference
ΔE00 70.0
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #091101 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 11.48:1, ΔE00 74.6.
deuteranopia
Ratio 9.74:1, ΔE00 66.7.
tritanopia
Ratio 8.97:1, ΔE00 60.5.
The weakest of the three is tritanopia, where the two are ΔE00 60.5 apart against 70.0 for a trichromat — still clearly two colours.
Both colours have pages of their own: Memorial Black ·Corrosive Green · the same pair the other way round ·all pairs