Stonewall Grey vs Regiment Grey

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Regiment Grey is a little darker, more muted than Stonewall Grey.

Can I use Regiment Grey instead of Stonewall Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Regiment Grey is a little darker, more muted than Stonewall Grey.

Can I use Stonewall Grey instead of Regiment Grey?

The same difference applies the other way round: Stonewall Grey 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.