ΔE 15.0, fair: the same colour family, but not a straight swap. Light Brown is a little lighter, more muted than English Field Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Light Brown is a little lighter, more muted than English Field Brown.
The same difference applies the other way round: English Field Brown is a little darker, 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.
See English Field Brown on the colour wheel See Light Brown on the colour wheel
All matches: English Field Brown equivalents · Light Brown equivalents