Black Sabbath on Magic Carpet
#220022 on #9488be
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
5.98:1
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 43.7
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 44.9
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 6.07:1, ΔE00 44.3.
deuteranopia
Ratio 5.93:1, ΔE00 44.1.
tritanopia
Ratio 5.72:1, ΔE00 46.8.
The weakest of the three is deuteranopia, where the two are ΔE00 44.1 apart against 44.9 for a trichromat — still clearly two colours.
Both colours have pages of their own: Black Sabbath ·Magic Carpet · the same pair the other way round ·all pairs