Abyssal Waters on Vintage Bloom
#005765 on #c0b0d0
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
4.06:1
Large text only
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc 46.4
Clears Lc 45 — large or heavy display text.
Dark text on a lighter ground.
Colour difference
ΔE00 49.1
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#00505d is the nearest colour of the same hue that passes AA on #c0b0d0, at 4.50:1. Only the lightness moved, and some chroma was given up to stay inside sRGB — which is the point: your colour stays recognisably your colour.
And to someone missing a cone
protanopia
Ratio 3.69:1, ΔE00 36.3.
deuteranopia
Ratio 4.29:1, ΔE00 41.1.
tritanopia
Ratio 4.17:1, ΔE00 58.7.
The weakest of the three is protanopia, where the two are ΔE00 36.3 apart against 49.1 for a trichromat — still clearly two colours.
Both colours have pages of their own: Abyssal Waters ·Vintage Bloom · the same pair the other way round ·all pairs