Night Black vs Dark Leather

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Dark Leather is a little lighter, more muted than Night Black.

Can I use Dark Leather instead of Night Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Leather is a little lighter, more muted than Night Black.

Can I use Night Black instead of Dark Leather?

The same difference applies the other way round: Night Black is a little darker, more saturated.

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.