Cyantific on Flirt
#77c9c2 on #7a2e4d
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
4.69:1
Passes AA for body text
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc -52.5
Clears Lc 45 — large or heavy display text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 64.2
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #77c9c2 can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 6.00:1, ΔE00 52.3.
deuteranopia
Ratio 4.15:1, ΔE00 40.7.
tritanopia
Ratio 3.17:1, ΔE00 61.5.
The weakest of the three is deuteranopia, where the two are ΔE00 40.7 apart against 64.2 for a trichromat — still clearly two colours.
Both colours have pages of their own: Cyantific ·Flirt · the same pair the other way round ·all pairs