Black Box on Matt Green
#0f282f 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
5.31:1
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 45.3
Clears Lc 45 — large or heavy display text.
Dark text on a lighter ground.
Colour difference
ΔE00 51.5
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #0f282f can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 5.76:1, ΔE00 54.7.
deuteranopia
Ratio 5.06:1, ΔE00 50.8.
tritanopia
Ratio 4.98:1, ΔE00 40.2.
The weakest of the three is tritanopia, where the two are ΔE00 40.2 apart against 51.5 for a trichromat — still clearly two colours.
Both colours have pages of their own: Black Box ·Matt Green · the same pair the other way round ·all pairs