ΔE 11.8, fair: the same colour family, but not a straight swap. Rhinox Hide is a little darker, more saturated than WWI British Khaki Brown Base.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Rhinox Hide is a little darker, more saturated than WWI British Khaki Brown Base.
The same difference applies the other way round: WWI British Khaki Brown Base is a little lighter, more muted.
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 WWI British Khaki Brown Base on the colour wheel See Rhinox Hide on the colour wheel
All matches: WWI British Khaki Brown Base equivalents · Rhinox Hide equivalents