Field Grey Base #1 (Green uniform) vs Dark Soviet Khaki

How close are they?

ΔE 2.7, very close: most people won’t see a difference side by side. Dark Soviet Khaki is warmer than Field Grey Base #1 (Green uniform).

Can I use Dark Soviet Khaki instead of Field Grey Base #1 (Green uniform)?

Yes, for most jobs. Very close match (ΔE 3). Dark Soviet Khaki is warmer than Field Grey Base #1 (Green uniform).

Can I use Field Grey Base #1 (Green uniform) instead of Dark Soviet Khaki?

The same difference applies the other way round: Field Grey Base #1 (Green uniform) is cooler.

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.