Bluebird Grey vs Sombre Grey

How close are they?

ΔE 14.0, fair: the same colour family, but not a straight swap. Sombre Grey is noticeably lighter, cooler than Bluebird Grey.

Can I use Sombre Grey instead of Bluebird Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Sombre Grey is noticeably lighter, cooler than Bluebird Grey.

Can I use Bluebird Grey instead of Sombre Grey?

The same difference applies the other way round: Bluebird Grey is noticeably darker, 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.