Dark Brown vs Husk Brown

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Husk Brown is more muted, cooler than Dark Brown.

Can I use Husk Brown instead of Dark Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Husk Brown is more muted, cooler than Dark Brown.

Can I use Dark Brown instead of Husk Brown?

The same difference applies the other way round: Dark Brown is more saturated, 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.