ΔE 11.8, fair: the same colour family, but not a straight swap. Blue Green is a little darker, more saturated than Haze Gray.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Blue Green is a little darker, more saturated than Haze Gray.
The same difference applies the other way round: Haze Gray 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.
See Haze Gray on the colour wheel See Blue Green on the colour wheel
All matches: Haze Gray equivalents · Blue Green equivalents