ΔE 12.4, fair: the same colour family, but not a straight swap. Golden Shadow is a little lighter, more muted, cooler than Bullwhack Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Golden Shadow is a little lighter, more muted, cooler than Bullwhack Brown.
The same difference applies the other way round: Bullwhack Brown is a little darker, more saturated, 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 Bullwhack Brown on the colour wheel See Golden Shadow on the colour wheel
All matches: Bullwhack Brown equivalents · Golden Shadow equivalents