Stonewall Grey vs Onyx Skin

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Onyx Skin is a little darker, more saturated, warmer than Stonewall Grey.

Can I use Onyx Skin instead of Stonewall Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Onyx Skin is a little darker, more saturated, warmer than Stonewall Grey.

Can I use Stonewall Grey instead of Onyx Skin?

The same difference applies the other way round: Stonewall Grey is a little lighter, 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.