ΔE 12.3, fair: the same colour family, but not a straight swap. Hydra Turquoise is more saturated, warmer than Green Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Hydra Turquoise is more saturated, warmer than Green Blue.
The same difference applies the other way round: Green Blue is more muted, cooler.
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 Green Blue on the colour wheel See Hydra Turquoise on the colour wheel
All matches: Green Blue equivalents · Hydra Turquoise equivalents