Chipping vs Steel Legion Drab

How close are they?

ΔE 6.6, close: similar, with a visible difference side by side. Steel Legion Drab is more muted, cooler than Chipping.

Can I use Steel Legion Drab instead of Chipping?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Steel Legion Drab is more muted, cooler than Chipping.

Can I use Chipping instead of Steel Legion Drab?

The same difference applies the other way round: Chipping 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.