Salted Capers on Olympian Blue
#a69151 on #1c4c8c
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
2.76:1
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 -29.6
Clears Lc 15 — disabled or purely decorative text, which is not meant to be read.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 52.2
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#d1bb7a is the nearest colour of the same hue that passes AA on #1c4c8c, 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 2.54:1, ΔE00 54.7.
deuteranopia
Ratio 2.89:1, ΔE00 58.7.
tritanopia
Ratio 2.95:1, ΔE00 73.7.
The weakest of the three is protanopia, where the two are ΔE00 54.7 apart against 52.2 for a trichromat — still clearly two colours.
Both colours have pages of their own: Salted Capers ·Olympian Blue · the same pair the other way round ·all pairs