Hardened Carapace vs Umbral Umber

How close are they?

ΔE 10.3, fair: the same colour family, but not a straight swap. Umbral Umber is a little darker, more saturated than Hardened Carapace.

Can I use Umbral Umber instead of Hardened Carapace?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Umbral Umber is a little darker, more saturated than Hardened Carapace.

Can I use Hardened Carapace instead of Umbral Umber?

The same difference applies the other way round: Hardened Carapace 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.