ΔE 13.5, fair: the same colour family, but not a straight swap. Fallen Grass is noticeably darker, more saturated, cooler than Raw Wool.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Fallen Grass is noticeably darker, more saturated, cooler than Raw Wool.
The same difference applies the other way round: Raw Wool is noticeably lighter, more muted, warmer.
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 Raw Wool on the colour wheel See Fallen Grass on the colour wheel
All matches: Raw Wool equivalents · Fallen Grass equivalents