ΔE 14.4, fair: the same colour family, but not a straight swap. Blue Green is noticeably darker, cooler than Surf Aqua.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Blue Green is noticeably darker, cooler than Surf Aqua.
The same difference applies the other way round: Surf Aqua is noticeably lighter, 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.
See Surf Aqua on the colour wheel See Blue Green on the colour wheel
All matches: Surf Aqua equivalents · Blue Green equivalents