Brown Base FS-30108 vs Flat Earth

How close are they?

ΔE 7.2, close: similar, with a visible difference side by side. Flat Earth is a little lighter, warmer than Brown Base FS-30108.

Can I use Flat Earth instead of Brown Base FS-30108?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Flat Earth is a little lighter, warmer than Brown Base FS-30108.

Can I use Brown Base FS-30108 instead of Flat Earth?

The same difference applies the other way round: Brown Base FS-30108 is a little darker, 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.