WWI British Khaki Brown Base vs Dark Soviet Khaki

How close are they?

ΔE 5.7, very close: most people won’t see a difference side by side. Dark Soviet Khaki is cooler than WWI British Khaki Brown Base.

Can I use Dark Soviet Khaki instead of WWI British Khaki Brown Base?

Yes, for most jobs. Very close match (ΔE 6). Dark Soviet Khaki is cooler than WWI British Khaki Brown Base.

Can I use WWI British Khaki Brown Base instead of Dark Soviet Khaki?

The same difference applies the other way round: WWI British Khaki Brown Base is 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.