French Blue vs Russ Grey

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Russ Grey is a little darker, more saturated than French Blue.

Can I use Russ Grey instead of French Blue?

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

Can I use French Blue instead of Russ Grey?

The same difference applies the other way round: French Blue is a little lighter, more muted.

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.