Black Box on Hint of Blue
#0f282f on #cee1f2
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
11.49:1
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 83.1
Clears Lc 75 — body text at a normal size and weight.
Dark text on a lighter ground.
Colour difference
ΔE00 73.8
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 11.40:1, ΔE00 72.7.
deuteranopia
Ratio 11.53:1, ΔE00 74.0.
tritanopia
Ratio 11.19:1, ΔE00 73.5.
The weakest of the three is protanopia, where the two are ΔE00 72.7 apart against 73.8 for a trichromat — still clearly two colours.
Both colours have pages of their own: Black Box ·Hint of Blue · the same pair the other way round ·all pairs