Flirt on Chocolate Castle
#7a2e4d on #452207
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
1.57:1
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 -7.8
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 24.4
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#cc7896 is the nearest colour of the same hue that passes AA on #452207, 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 1.41:1, ΔE00 25.9.
deuteranopia
Ratio 1.64:1, ΔE00 18.1.
tritanopia
Ratio 1.79:1, ΔE00 13.8.
The weakest of the three is tritanopia, where the two are ΔE00 13.8 apart against 24.4 for a trichromat — still clearly two colours.
Both colours have pages of their own: Flirt ·Chocolate Castle · the same pair the other way round ·all pairs