Apocalypse Sky vs Demon Red

How close are they?

ΔE 13.9, fair: the same colour family, but not a straight swap. Demon Red is a little darker, more saturated than Apocalypse Sky.

Can I use Demon Red instead of Apocalypse Sky?

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

Can I use Apocalypse Sky instead of Demon Red?

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

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.