ΔE 10.3, fair: the same colour family, but not a straight swap. Buff is more saturated, warmer than Canvas.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Buff is more saturated, warmer than Canvas.
The same difference applies the other way round: Canvas is more muted, cooler.
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 Canvas on the colour wheel See Buff on the colour wheel
All matches: Canvas equivalents · Buff equivalents