Florida’s Alligator on Secret Passage
#664422 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
1.61:1
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 -8.3
Below Lc 15: the draft treats this as not text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 13.0
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#b18b67 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 1.54:1, ΔE00 9.4.
deuteranopia
Ratio 1.65:1, ΔE00 11.0.
tritanopia
Ratio 1.76:1, ΔE00 13.6.
The weakest of the three is protanopia, where the two are ΔE00 9.4 apart against 13.0 for a trichromat — still two colours, but a closer call than it looks to you.
Both colours have pages of their own: Florida’s Alligator ·Secret Passage · the same pair the other way round ·all pairs