Night Lords Blue vs Abyss Blue

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Abyss Blue is noticeably darker, more muted, warmer than Night Lords Blue.

Can I use Abyss Blue instead of Night Lords Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Abyss Blue is noticeably darker, more muted, warmer than Night Lords Blue.

Can I use Night Lords Blue instead of Abyss Blue?

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