Drab Green vs Russian Green (4BO, 1947-)

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. Russian Green (4BO, 1947-) is a little darker, more muted than Drab Green.

Can I use Russian Green (4BO, 1947-) instead of Drab Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Russian Green (4BO, 1947-) is a little darker, more muted than Drab Green.

Can I use Drab Green instead of Russian Green (4BO, 1947-)?

The same difference applies the other way round: Drab Green is a little lighter, 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.