ΔE 10.9, fair: the same colour family, but not a straight swap. Green Brown is noticeably lighter, cooler than Uniform Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Green Brown is noticeably lighter, cooler than Uniform Brown.
The same difference applies the other way round: Uniform Brown is noticeably darker, 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 Uniform Brown on the colour wheel See Green Brown on the colour wheel
All matches: Uniform Brown equivalents · Green Brown equivalents