Grapest on Midnight Edition
#880066 on #0c121b
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
2.00:1
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 -12.2
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 30.1
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#c84d9f is the nearest colour of the same hue that passes AA on #0c121b, 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 1.52:1, ΔE00 18.3.
deuteranopia
Ratio 2.26:1, ΔE00 19.8.
tritanopia
Ratio 2.91:1, ΔE00 45.4.
The weakest of the three is protanopia, where the two are ΔE00 18.3 apart against 30.1 for a trichromat — still clearly two colours.
Both colours have pages of their own: Grapest ·Midnight Edition · the same pair the other way round ·all pairs