Onyx Skin vs Chestnut Brown

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Chestnut Brown is a little darker, more saturated, cooler than Onyx Skin.

Can I use Chestnut Brown instead of Onyx Skin?

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

Can I use Onyx Skin instead of Chestnut Brown?

The same difference applies the other way round: Onyx Skin is a little lighter, more muted, warmer.

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.