ΔE 18.3, loose: different enough that you should pick on purpose. Light Emerald is a little darker, warmer than Trollblood Base.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Light Emerald is a little darker, warmer than Trollblood Base.
The same difference applies the other way round: Trollblood Base is a little lighter, cooler.
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 Trollblood Base on the colour wheel See Light Emerald on the colour wheel
All matches: Trollblood Base equivalents · Light Emerald equivalents