ΔE 12.0, fair: the same colour family, but not a straight swap. Sea Grey is a little darker, more muted than Bluebird Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Sea Grey is a little darker, more muted than Bluebird Grey.
The same difference applies the other way round: Bluebird Grey is a little lighter, more saturated.
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.
See Bluebird Grey on the colour wheel See Sea Grey on the colour wheel
All matches: Bluebird Grey equivalents · Sea Grey equivalents