ΔE 8.5, close: similar, with a visible difference side by side. Light Green Chrom. is a little darker, warmer than Fallen Grass.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Light Green Chrom. is a little darker, warmer than Fallen Grass.
The same difference applies the other way round: Fallen Grass 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 Fallen Grass on the colour wheel See Light Green Chrom. on the colour wheel
All matches: Fallen Grass equivalents · Light Green Chrom. equivalents