Out of the Blue on Nordic Noir
#1199ee on #003344
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
4.38:1
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 -39.6
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 38.3
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#179bf0 is the nearest colour of the same hue that passes AA on #003344, 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 4.60:1, ΔE00 41.3.
deuteranopia
Ratio 4.25:1, ΔE00 37.7.
tritanopia
Ratio 3.57:1, ΔE00 30.6.
The weakest of the three is tritanopia, where the two are ΔE00 30.6 apart against 38.3 for a trichromat — still clearly two colours.
Both colours have pages of their own: Out of the Blue ·Nordic Noir · the same pair the other way round ·all pairs