ΔE 13.1, fair: the same colour family, but not a straight swap. IJA Grey Green is noticeably lighter, cooler than Temple Stone.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). IJA Grey Green is noticeably lighter, cooler than Temple Stone.
The same difference applies the other way round: Temple Stone is noticeably darker, 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.
See Temple Stone on the colour wheel See IJA Grey Green on the colour wheel
All matches: Temple Stone equivalents · IJA Grey Green equivalents