Dark Mustard Khaki vs English Uniform

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. English Uniform is a little darker, warmer than Dark Mustard Khaki.

Can I use English Uniform instead of Dark Mustard Khaki?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). English Uniform is a little darker, warmer than Dark Mustard Khaki.

Can I use Dark Mustard Khaki instead of English Uniform?

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