Purple Climax on Frozen Forest
#8800ff on #cfe8b6
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
4.55:1
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 59.0
Clears Lc 45 — large or heavy display text.
Dark text on a lighter ground.
Colour difference
ΔE00 77.2
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #8800ff can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 5.50:1, ΔE00 73.8.
deuteranopia
Ratio 4.15:1, ΔE00 65.6.
tritanopia
Ratio 4.34:1, ΔE00 37.6.
The weakest of the three is tritanopia, where the two are ΔE00 37.6 apart against 77.2 for a trichromat — still clearly two colours.
Both colours have pages of their own: Purple Climax ·Frozen Forest · the same pair the other way round ·all pairs