Deep Grey vs Bluebird Grey

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Bluebird Grey is a little lighter, more saturated, warmer than Deep Grey.

Can I use Bluebird Grey instead of Deep Grey?

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

Can I use Deep Grey instead of Bluebird Grey?

The same difference applies the other way round: Deep Grey is a little darker, 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.