ΔE 12.2, fair: the same colour family, but not a straight swap. Pale Brown is a little lighter, more saturated than Stone Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Pale Brown is a little lighter, more saturated than Stone Grey.
The same difference applies the other way round: Stone Grey is a little darker, 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 Stone Grey on the colour wheel See Pale Brown on the colour wheel
All matches: Stone Grey equivalents · Pale Brown equivalents