Fog Grey vs Violet Grey

How close are they?

ΔE 10.5, fair: the same colour family, but not a straight swap. Violet Grey is a little darker, warmer than Fog Grey.

Can I use Violet Grey instead of Fog Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Violet Grey is a little darker, warmer than Fog Grey.

Can I use Fog Grey instead of Violet Grey?

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