Chaotic Red vs Burnt Sienna

How close are they?

ΔE 13.7, fair: the same colour family, but not a straight swap. Burnt Sienna is noticeably lighter, more saturated than Chaotic Red.

Can I use Burnt Sienna instead of Chaotic Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Burnt Sienna is noticeably lighter, more saturated than Chaotic Red.

Can I use Chaotic Red instead of Burnt Sienna?

The same difference applies the other way round: Chaotic Red is noticeably darker, 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.