ΔE 13.8, fair: the same colour family, but not a straight swap. Violet Vamp is a little darker, more muted, warmer than Character Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Violet Vamp is a little darker, more muted, warmer than Character Blue.
The same difference applies the other way round: Character Blue is a little lighter, 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 Character Blue on the colour wheel See Violet Vamp on the colour wheel
All matches: Character Blue equivalents · Violet Vamp equivalents