Sand Grey vs Light Soviet Khaki

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Light Soviet Khaki is a little lighter, more saturated than Sand Grey.

Can I use Light Soviet Khaki instead of Sand Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Light Soviet Khaki is a little lighter, more saturated than Sand Grey.

Can I use Sand Grey instead of Light Soviet Khaki?

The same difference applies the other way round: Sand Grey is a little darker, more muted.

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.