Nº5 Earth Brown (FS30099) 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, more saturated than Nº5 Earth Brown (FS30099).

Can I use Flat Earth instead of Nº5 Earth Brown (FS30099)?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Flat Earth is a little lighter, more saturated than Nº5 Earth Brown (FS30099).

Can I use Nº5 Earth Brown (FS30099) instead of Flat Earth?

The same difference applies the other way round: Nº5 Earth Brown (FS30099) is a little darker, more muted.

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.