ΔE 11.1, fair: the same colour family, but not a straight swap. Cygnar Blue Base is a little darker, more saturated, warmer than Viking Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Cygnar Blue Base is a little darker, more saturated, warmer than Viking Blue.
The same difference applies the other way round: Viking 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 Viking Blue on the colour wheel See Cygnar Blue Base on the colour wheel
All matches: Viking Blue equivalents · Cygnar Blue Base equivalents