ΔE 12.8, fair: the same colour family, but not a straight swap. Hull Red is noticeably lighter, cooler than Walnut Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Hull Red is noticeably lighter, cooler than Walnut Brown.
The same difference applies the other way round: Walnut 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 Walnut Brown on the colour wheel See Hull Red on the colour wheel
All matches: Walnut Brown equivalents · Hull Red equivalents