Chocolate Castle on Out of the Blue
#452207 on #1199ee
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
4.59:1
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 41.5
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 55.7
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #452207 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 5.39:1, ΔE00 59.4.
deuteranopia
Ratio 4.21:1, ΔE00 59.1.
tritanopia
Ratio 3.24:1, ΔE00 61.1.
The weakest of the three is deuteranopia, where the two are ΔE00 59.1 apart against 55.7 for a trichromat — still clearly two colours.
Both colours have pages of their own: Chocolate Castle ·Out of the Blue · the same pair the other way round ·all pairs