Super Pink on Galactic Federation
#ce6ba6 on #330077
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
4.46:1
Large text only
Not AAA (7:1). Swapping the two colours gives the same number — the ratio does not know which is the text.
APCA
Lc -36.6
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 41.5
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#cf6ca7 is the nearest colour of the same hue that passes AA on #330077, 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 3.94:1, ΔE00 34.7.
deuteranopia
Ratio 4.72:1, ΔE00 42.5.
tritanopia
Ratio 5.63:1, ΔE00 70.1.
The weakest of the three is protanopia, where the two are ΔE00 34.7 apart against 41.5 for a trichromat — still clearly two colours.
Both colours have pages of their own: Super Pink ·Galactic Federation · the same pair the other way round ·all pairs