Traitor Red vs Umbral Umber

How close are they?

ΔE 10.2, fair: the same colour family, but not a straight swap. Umbral Umber is noticeably darker than Traitor Red.

Can I use Umbral Umber instead of Traitor Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Umbral Umber is noticeably darker than Traitor Red.

Can I use Traitor Red instead of Umbral Umber?

The same difference applies the other way round: Traitor Red is noticeably lighter.

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.