ΔE 13.3, fair: the same colour family, but not a straight swap. Cobalt Green is noticeably darker than Exile Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Cobalt Green is noticeably darker than Exile Green.
The same difference applies the other way round: Exile Green is noticeably lighter.
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 Exile Green on the colour wheel See Cobalt Green on the colour wheel
All matches: Exile Green equivalents · Cobalt Green equivalents