Brown Gray vs London Grey

How close are they?

ΔE 11.9, fair: the same colour family, but not a straight swap. London Grey is a little darker, more muted than Brown Gray.

Can I use London Grey instead of Brown Gray?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). London Grey is a little darker, more muted than Brown Gray.

Can I use Brown Gray instead of London Grey?

The same difference applies the other way round: Brown Gray is a little lighter, more saturated.

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.