Ruddy Umber vs Dull Red

How close are they?

ΔE 10.1, fair: the same colour family, but not a straight swap. Dull Red is a little darker, more saturated than Ruddy Umber.

Can I use Dull Red instead of Ruddy Umber?

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

Can I use Ruddy Umber instead of Dull Red?

The same difference applies the other way round: Ruddy Umber 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.