ΔE 11.5, fair: the same colour family, but not a straight swap. Kantor Blue is a little darker, more saturated, warmer than Omega Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Kantor Blue is a little darker, more saturated, warmer than Omega Blue.
The same difference applies the other way round: Omega Blue is a little lighter, 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 Omega Blue on the colour wheel See Kantor Blue on the colour wheel
All matches: Omega Blue equivalents · Kantor Blue equivalents