Night Lords Blue vs Turquoise Deep

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Turquoise Deep is more muted than Night Lords Blue.

Can I use Turquoise Deep instead of Night Lords Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Turquoise Deep is more muted than Night Lords Blue.

Can I use Night Lords Blue instead of Turquoise Deep?

The same difference applies the other way round: Night Lords Blue is 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.