Quiet Abyss on Highlander
#160435 on #3a533d
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
2.25:1
Fails AA
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc 13.9
Below Lc 15: the draft treats this as not text.
Dark text on a lighter ground.
Colour difference
ΔE00 37.0
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#c1b5f4 is the nearest colour of the same hue that passes AA on #3a533d, at 4.50:1. Only the lightness moved — which is the point: your colour stays recognisably your colour.
And to someone missing a cone
protanopia
Ratio 2.37:1, ΔE00 37.9.
deuteranopia
Ratio 2.19:1, ΔE00 34.5.
tritanopia
Ratio 2.22:1, ΔE00 20.4.
The weakest of the three is tritanopia, where the two are ΔE00 20.4 apart against 37.0 for a trichromat — still clearly two colours.
Both colours have pages of their own: Quiet Abyss ·Highlander · the same pair the other way round ·all pairs