Umberroot vs Light Umber

How close are they?

ΔE 6.1, close: similar, with a visible difference side by side. Light Umber is more muted, warmer than Umberroot.

Can I use Light Umber instead of Umberroot?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Light Umber is more muted, warmer than Umberroot.

Can I use Umberroot instead of Light Umber?

The same difference applies the other way round: Umberroot is more saturated, cooler.

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.