ΔE 14.7, fair: the same colour family, but not a straight swap. Turquoise is a little darker, cooler than Baby Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Turquoise is a little darker, cooler than Baby Blue.
The same difference applies the other way round: Baby Blue is a little 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 Baby Blue on the colour wheel See Turquoise on the colour wheel
All matches: Baby Blue equivalents · Turquoise equivalents