ΔE 18.1, loose: different enough that you should pick on purpose. Light Blue Green is more muted, cooler than Cobalt Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Light Blue Green is more muted, cooler than Cobalt Green.
The same difference applies the other way round: Cobalt Green is 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.
See Cobalt Green on the colour wheel See Light Blue Green on the colour wheel
All matches: Cobalt Green equivalents · Light Blue Green equivalents