Porcini on Atomic Pink
#d9ae86 on #fb7efd
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
1.09:1
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 0.0
Below Lc 15: the draft treats this as not text.
Too close to call.
Colour difference
ΔE00 42.0
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#5f3b13 is the nearest colour of the same hue that passes AA on #fb7efd, 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 1.24:1, ΔE00 47.6.
deuteranopia
Ratio 1.03:1, ΔE00 44.7.
tritanopia
Ratio 1.04:1, ΔE00 1.0.
The weakest of the three is tritanopia, where the two are ΔE00 1.0 apart against 42.0 for a trichromat — effectively one colour. If anything on your interface depends on telling these apart, it needs a second signal.
Both colours have pages of their own: Porcini ·Atomic Pink · the same pair the other way round ·all pairs