Alga Green vs Olive Drab

How close are they?

ΔE 11.8, fair: the same colour family, but not a straight swap. Olive Drab is a little darker, more muted than Alga Green.

Can I use Olive Drab instead of Alga Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Olive Drab is a little darker, more muted than Alga Green.

Can I use Alga Green instead of Olive Drab?

The same difference applies the other way round: Alga 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.