ΔE 12.1, fair: the same colour family, but not a straight swap. Japan. Unif. WWII is a little darker, more saturated than Basilisk Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Japan. Unif. WWII is a little darker, more saturated than Basilisk Brown.
The same difference applies the other way round: Basilisk Brown 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 Basilisk Brown on the colour wheel See Japan. Unif. WWII on the colour wheel
All matches: Basilisk Brown equivalents · Japan. Unif. WWII equivalents