Cyantific on Cherry on Top
#77c9c2 on #ac495c
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
2.83:1
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 -39.8
Clears Lc 30 — the floor: below this the draft considers text not readable at any size.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 57.5
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#a6f9f1 is the nearest colour of the same hue that passes AA on #ac495c, 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 3.78:1, ΔE00 35.5.
deuteranopia
Ratio 2.46:1, ΔE00 30.0.
tritanopia
Ratio 1.78:1, ΔE00 58.7.
The weakest of the three is deuteranopia, where the two are ΔE00 30.0 apart against 57.5 for a trichromat — still clearly two colours.
Both colours have pages of their own: Cyantific ·Cherry on Top · the same pair the other way round ·all pairs