Secret Path on Secret Passage
#737054 on #372a05
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
2.79:1
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 -22.7
Clears Lc 15 — disabled or purely decorative text, which is not meant to be read.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 24.1
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#969376 is the nearest colour of the same hue that passes AA on #372a05, 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 2.84:1, ΔE00 23.7.
deuteranopia
Ratio 2.77:1, ΔE00 23.3.
tritanopia
Ratio 2.67:1, ΔE00 22.2.
The weakest of the three is tritanopia, where the two are ΔE00 22.2 apart against 24.1 for a trichromat — still clearly two colours.
Both colours have pages of their own: Secret Path ·Secret Passage · the same pair the other way round ·all pairs