Turquoise vs Temple Gate Teal

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Temple Gate Teal is a little lighter, more saturated, warmer than Turquoise.

Can I use Temple Gate Teal instead of Turquoise?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Temple Gate Teal is a little lighter, more saturated, warmer than Turquoise.

Can I use Turquoise instead of Temple Gate Teal?

The same difference applies the other way round: Turquoise is a little darker, 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.