Master Sword Blue on Salted Capers
#00ffee 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
2.44:1
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 -46.7
Clears Lc 45 — large or heavy display text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 41.9
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#00332f 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 2.84:1, ΔE00 31.0.
deuteranopia
Ratio 2.23:1, ΔE00 38.0.
tritanopia
Ratio 1.66:1, ΔE00 54.9.
The weakest of the three is protanopia, where the two are ΔE00 31.0 apart against 41.9 for a trichromat — still clearly two colours.
Both colours have pages of their own: Master Sword Blue ·Salted Capers · the same pair the other way round ·all pairs