Russian Green (4BO) vs Light Green Chrom.

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Light Green Chrom. is a little lighter, more muted than Russian Green (4BO).

Can I use Light Green Chrom. instead of Russian Green (4BO)?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Green Chrom. is a little lighter, more muted than Russian Green (4BO).

Can I use Russian Green (4BO) instead of Light Green Chrom.?

The same difference applies the other way round: Russian Green (4BO) is a little darker, more saturated.

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.