Cold Black vs Bronze Green

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Bronze Green is a little lighter, more saturated than Cold Black.

Can I use Bronze Green instead of Cold Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Bronze Green is a little lighter, more saturated than Cold Black.

Can I use Cold Black instead of Bronze Green?

The same difference applies the other way round: Cold Black 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.