Temple Gate Teal vs Dark Emerald

How close are they?

ΔE 15.8, loose: different enough that you should pick on purpose. Dark Emerald is a little darker, much more muted, cooler than Temple Gate Teal.

Can I use Dark Emerald instead of Temple Gate Teal?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Dark Emerald is a little darker, much more muted, cooler than Temple Gate Teal.

Can I use Temple Gate Teal instead of Dark Emerald?

The same difference applies the other way round: Temple Gate Teal is a little lighter, 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.