Terror Blue-Grey vs Turquoise

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. Turquoise is a little darker, more saturated than Terror Blue-Grey.

Can I use Turquoise instead of Terror Blue-Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Turquoise is a little darker, more saturated than Terror Blue-Grey.

Can I use Terror Blue-Grey instead of Turquoise?

The same difference applies the other way round: Terror Blue-Grey is a little lighter, more muted.

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.