Putrid White vs Light Soviet Khaki

How close are they?

ΔE 7.2, close: similar, with a visible difference side by side. Light Soviet Khaki is more saturated than Putrid White.

Can I use Light Soviet Khaki instead of Putrid White?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Soviet Khaki is more saturated than Putrid White.

Can I use Putrid White instead of Light Soviet Khaki?

The same difference applies the other way round: Putrid White is 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.