Hammerfall Khaki vs USAAF Light Gray

How close are they?

ΔE 18.7, loose: different enough that you should pick on purpose. USAAF Light Gray is a little darker, much more muted, cooler than Hammerfall Khaki.

Can I use USAAF Light Gray instead of Hammerfall Khaki?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). USAAF Light Gray is a little darker, much more muted, cooler than Hammerfall Khaki.

Can I use Hammerfall Khaki instead of USAAF Light Gray?

The same difference applies the other way round: Hammerfall Khaki is a little lighter, much 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.