Frozen Forest on Dragon’s Fire
#cfe8b6 on #fc4a14
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
2.59:1
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 -45.7
Clears Lc 45 — large or heavy display text.
Light text on a darker ground — the negative sign is the polarity.
Colour difference
ΔE00 50.9
different colours
Above 10 — related only in the sense that both are colours.
What the text colour has to become
#182900 is the nearest colour of the same hue that passes AA on #fc4a14, 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 3.90:1, ΔE00 35.0.
deuteranopia
Ratio 2.18:1, ΔE00 24.1.
tritanopia
Ratio 1.49:1, ΔE00 46.6.
The weakest of the three is deuteranopia, where the two are ΔE00 24.1 apart against 50.9 for a trichromat — still clearly two colours.
Both colours have pages of their own: Frozen Forest ·Dragon’s Fire · the same pair the other way round ·all pairs