Hint of Blue on Nickel
#cee1f2 on #929292
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
2.32:1
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 -42.6
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 22.6
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#1e2d3a is the nearest colour of the same hue that passes AA on #929292, 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 2.37:1, ΔE00 22.5.
deuteranopia
Ratio 2.30:1, ΔE00 22.4.
tritanopia
Ratio 2.25:1, ΔE00 24.3.
The weakest of the three is deuteranopia, where the two are ΔE00 22.4 apart against 22.6 for a trichromat — still clearly two colours.
Both colours have pages of their own: Hint of Blue ·Nickel · the same pair the other way round ·all pairs