ΔE 13.8, fair: the same colour family, but not a straight swap. Sand Grey is a little darker, more saturated than Brainmatter Beige.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Sand Grey is a little darker, more saturated than Brainmatter Beige.
The same difference applies the other way round: Brainmatter Beige 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 Brainmatter Beige on the colour wheel See Sand Grey on the colour wheel
All matches: Brainmatter Beige equivalents · Sand Grey equivalents