Master Chief on Salted Capers
#507d2a on #a69151
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
1.58:1
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 13.8
Below Lc 15: the draft treats this as not text.
Dark text on a lighter ground.
Colour difference
ΔE00 22.3
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#193300 is the nearest colour of the same hue that passes AA on #a69151, 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 1.44:1, ΔE00 10.2.
deuteranopia
Ratio 1.66:1, ΔE00 13.9.
tritanopia
Ratio 1.69:1, ΔE00 56.7.
The weakest of the three is protanopia, where the two are ΔE00 10.2 apart against 22.3 for a trichromat — still clearly two colours.
Both colours have pages of their own: Master Chief ·Salted Capers · the same pair the other way round ·all pairs