ΔE 32.2, loose: different enough that you should pick on purpose. Graphite Green is noticeably darker, much more muted than Terradon Turquoise.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 32). Graphite Green is noticeably darker, much more muted than Terradon Turquoise.
The same difference applies the other way round: Terradon Turquoise is noticeably lighter, much 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 Terradon Turquoise on the colour wheel See Graphite Green on the colour wheel
All matches: Terradon Turquoise equivalents · Graphite Green equivalents