Sherwood Green vs Middle Stone

How close are they?

ΔE 15.8, loose: different enough that you should pick on purpose. Middle Stone is a little darker, more muted, warmer than Sherwood Green.

Can I use Middle Stone instead of Sherwood Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Middle Stone is a little darker, more muted, warmer than Sherwood Green.

Can I use Sherwood Green instead of Middle Stone?

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