Ethereal Espresso on Matt Green
#3e2723 on #39ad48
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
4.77:1
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 43.5
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 55.5
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #3e2723 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 5.52:1, ΔE00 48.6.
deuteranopia
Ratio 4.39:1, ΔE00 39.9.
tritanopia
Ratio 4.14:1, ΔE00 62.2.
The weakest of the three is deuteranopia, where the two are ΔE00 39.9 apart against 55.5 for a trichromat — still clearly two colours.
Both colours have pages of their own: Ethereal Espresso ·Matt Green · the same pair the other way round ·all pairs