ΔE 7.5, close: similar, with a visible difference side by side. Flat Brown is cooler than Light Umber.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Flat Brown is cooler than Light Umber.
The same difference applies the other way round: Light Umber is 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.
See Light Umber on the colour wheel See Flat Brown on the colour wheel
All matches: Light Umber equivalents · Flat Brown equivalents