ΔE 11.3, fair: the same colour family, but not a straight swap. Earth Green (Early) is a little lighter, more saturated, cooler than Dark Mud.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Earth Green (Early) is a little lighter, more saturated, cooler than Dark Mud.
The same difference applies the other way round: Dark Mud is a little darker, 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 Dark Mud on the colour wheel See Earth Green (Early) on the colour wheel
All matches: Dark Mud equivalents · Earth Green (Early) equivalents