ΔE 14.5, fair: the same colour family, but not a straight swap. Blueberry is noticeably lighter, more muted, warmer than Kingdom Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Blueberry is noticeably lighter, more muted, warmer than Kingdom Blue.
The same difference applies the other way round: Kingdom Blue is noticeably darker, more saturated, 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 Kingdom Blue on the colour wheel See Blueberry on the colour wheel
All matches: Kingdom Blue equivalents · Blueberry equivalents