ΔE 14.0, fair: the same colour family, but not a straight swap. Black Forest Green is noticeably darker, more muted than Temple Gate Teal.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Black Forest Green is noticeably darker, more muted than Temple Gate Teal.
The same difference applies the other way round: Temple Gate Teal is noticeably lighter, more saturated.
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.
See Temple Gate Teal on the colour wheel See Black Forest Green on the colour wheel
All matches: Temple Gate Teal equivalents · Black Forest Green equivalents