Olympian Blue on Master Sword Blue
#1c4c8c on #00ffee
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
6.72:1
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 73.9
Clears Lc 60 — headlines and other larger text.
Dark text on a lighter ground.
Colour difference
ΔE00 59.4
different colours
Above 10 — related only in the sense that both are colours.
Nothing to fix
This pair already clears 4.5:1, so #1c4c8c can stay exactly as it is. Check another pair.
And to someone missing a cone
protanopia
Ratio 7.21:1, ΔE00 57.1.
deuteranopia
Ratio 6.43:1, ΔE00 52.2.
tritanopia
Ratio 4.88:1, ΔE00 45.8.
The weakest of the three is tritanopia, where the two are ΔE00 45.8 apart against 59.4 for a trichromat — still clearly two colours.
Both colours have pages of their own: Olympian Blue ·Master Sword Blue · the same pair the other way round ·all pairs