Light Brown vs Deep Khaki Drill

How close are they?

ΔE 6.2, close: similar, with a visible difference side by side. Deep Khaki Drill is a little lighter than Light Brown.

Can I use Deep Khaki Drill instead of Light Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Deep Khaki Drill is a little lighter than Light Brown.

Can I use Light Brown instead of Deep Khaki Drill?

The same difference applies the other way round: Light Brown is a little darker.

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.