ΔE 12.9, fair: the same colour family, but not a straight swap. Hydra Turquoise is more saturated, cooler than Metallic Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Hydra Turquoise is more saturated, cooler than Metallic Blue.
The same difference applies the other way round: Metallic Blue is more muted, 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 Metallic Blue on the colour wheel See Hydra Turquoise on the colour wheel
All matches: Metallic Blue equivalents · Hydra Turquoise equivalents