Dark Umber vs Cam. Middle Brown

How close are they?

ΔE 14.1, fair: the same colour family, but not a straight swap. Cam. Middle Brown is noticeably lighter, cooler than Dark Umber.

Can I use Cam. Middle Brown instead of Dark Umber?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Cam. Middle Brown is noticeably lighter, cooler than Dark Umber.

Can I use Dark Umber instead of Cam. Middle Brown?

The same difference applies the other way round: Dark Umber is noticeably darker, warmer.

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.