Master Sword Blue on Pastel Brown
#00ffee on #836953
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
4.02:1
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 -64.0
Clears Lc 60 — headlines and other larger text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 50.5
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#b1fff5 is the nearest colour of the same hue that passes AA on #836953, at 4.50:1. Only the lightness moved, and some chroma was given up to stay inside sRGB — which is the point: your colour stays recognisably your colour.
And to someone missing a cone
protanopia
Ratio 4.76:1, ΔE00 39.7.
deuteranopia
Ratio 3.66:1, ΔE00 40.6.
tritanopia
Ratio 2.69:1, ΔE00 56.6.
The weakest of the three is protanopia, where the two are ΔE00 39.7 apart against 50.5 for a trichromat — still clearly two colours.
Both colours have pages of their own: Master Sword Blue ·Pastel Brown · the same pair the other way round ·all pairs