ΔE 13.6, fair: the same colour family, but not a straight swap. Hydra Turquoise is a little darker, more saturated, cooler than Astral Beryllium.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Hydra Turquoise is a little darker, more saturated, cooler than Astral Beryllium.
The same difference applies the other way round: Astral Beryllium is a little lighter, 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 Astral Beryllium on the colour wheel See Hydra Turquoise on the colour wheel
All matches: Astral Beryllium equivalents · Hydra Turquoise equivalents