Apocalypse Sky vs Bright Orange

How close are they?

ΔE 13.7, fair: the same colour family, but not a straight swap. Bright Orange is more saturated, warmer than Apocalypse Sky.

Can I use Bright Orange instead of Apocalypse Sky?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Bright Orange is more saturated, warmer than Apocalypse Sky.

Can I use Apocalypse Sky instead of Bright Orange?

The same difference applies the other way round: Apocalypse Sky is more muted, cooler.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.