Talassar Blue vs Dark Turquoise

How close are they?

ΔE 36.0, loose: different enough that you should pick on purpose. Dark Turquoise is much more muted, cooler than Talassar Blue.

Can I use Dark Turquoise instead of Talassar Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 36). Dark Turquoise is much more muted, cooler than Talassar Blue.

Can I use Talassar Blue instead of Dark Turquoise?

The same difference applies the other way round: Talassar Blue is much more saturated, 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.