ΔE 14.2, fair: the same colour family, but not a straight swap. Crystal Blue is a little lighter, more saturated than Power Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Crystal Blue is a little lighter, more saturated than Power Blue.
The same difference applies the other way round: Power Blue is a little darker, more muted.
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 Power Blue on the colour wheel See Crystal Blue on the colour wheel
All matches: Power Blue equivalents · Crystal Blue equivalents