Dark Yellow Green vs Uniform Green

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Uniform Green is more muted, cooler than Dark Yellow Green.

Can I use Uniform Green instead of Dark Yellow Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Uniform Green is more muted, cooler than Dark Yellow Green.

Can I use Dark Yellow Green instead of Uniform Green?

The same difference applies the other way round: Dark Yellow Green is more saturated, 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.