Umberroot vs Flat Brown

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Flat Brown is a little lighter, more muted than Umberroot.

Can I use Flat Brown instead of Umberroot?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Flat Brown is a little lighter, more muted than Umberroot.

Can I use Umberroot instead of Flat Brown?

The same difference applies the other way round: Umberroot is a little darker, more saturated.

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.