Night Lords Blue vs Deep Blue

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Deep Blue is a little darker, more muted, warmer than Night Lords Blue.

Can I use Deep Blue instead of Night Lords Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Deep Blue is a little darker, more muted, warmer than Night Lords Blue.

Can I use Night Lords Blue instead of Deep Blue?

The same difference applies the other way round: Night Lords Blue is a little lighter, more saturated, 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.