Corrosive Green on Flirt
#54d905 on #7a2e4d
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
4.86:1
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 -54.8
Clears Lc 45 — large or heavy display text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 81.6
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #54d905 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 6.42:1, ΔE00 67.1.
deuteranopia
Ratio 4.21:1, ΔE00 48.2.
tritanopia
Ratio 3.22:1, ΔE00 61.4.
The weakest of the three is deuteranopia, where the two are ΔE00 48.2 apart against 81.6 for a trichromat — still clearly two colours.
Both colours have pages of their own: Corrosive Green ·Flirt · the same pair the other way round ·all pairs