ΔE 10.4, fair: the same colour family, but not a straight swap. 6K Russian Brown is a little darker than Woodland Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). 6K Russian Brown is a little darker than Woodland Green.
The same difference applies the other way round: Woodland Green is a little lighter.
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 Woodland Green on the colour wheel See 6K Russian Brown on the colour wheel
All matches: Woodland Green equivalents · 6K Russian Brown equivalents