Nougat on Flash in the Pan
#ae8a78 on #ff9977
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
1.50:1
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 15.8
Clears Lc 15 — disabled or purely decorative text, which is not meant to be read.
Dark text on a lighter ground.
Colour difference
ΔE00 16.4
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#5f3f2f is the nearest colour of the same hue that passes AA on #ff9977, 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 1.36:1, ΔE00 10.8.
deuteranopia
Ratio 1.57:1, ΔE00 15.1.
tritanopia
Ratio 1.81:1, ΔE00 15.1.
The weakest of the three is protanopia, where the two are ΔE00 10.8 apart against 16.4 for a trichromat — still clearly two colours.
Both colours have pages of their own: Nougat ·Flash in the Pan · the same pair the other way round ·all pairs