Black Sabbath on Dragon’s Fire
#220022 on #fc4a14
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
5.62:1
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 42.7
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 55.2
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #220022 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 3.95:1, ΔE00 51.0.
deuteranopia
Ratio 6.48:1, ΔE00 62.0.
tritanopia
Ratio 9.21:1, ΔE00 64.9.
The weakest of the three is protanopia, where the two are ΔE00 51.0 apart against 55.2 for a trichromat — still clearly two colours.
Both colours have pages of their own: Black Sabbath ·Dragon’s Fire · the same pair the other way round ·all pairs