Dark Grey Blue vs Abyssal Turquoise

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. Abyssal Turquoise is a little lighter, cooler than Dark Grey Blue.

Can I use Abyssal Turquoise instead of Dark Grey Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Abyssal Turquoise is a little lighter, cooler than Dark Grey Blue.

Can I use Dark Grey Blue instead of Abyssal Turquoise?

The same difference applies the other way round: Dark Grey Blue is a little darker, warmer.

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.