Caspian Blue vs Turquoise

How close are they?

ΔE 13.7, fair: the same colour family, but not a straight swap. Turquoise is noticeably darker, more saturated, warmer than Caspian Blue.

Can I use Turquoise instead of Caspian Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Turquoise is noticeably darker, more saturated, warmer than Caspian Blue.

Can I use Caspian Blue instead of Turquoise?

The same difference applies the other way round: Caspian Blue is noticeably lighter, more muted, 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.