ΔE 10.1, fair: the same colour family, but not a straight swap. Electric Blue is a little lighter, more saturated than Interior Blue Soviet.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Electric Blue is a little lighter, more saturated than Interior Blue Soviet.
The same difference applies the other way round: Interior Blue Soviet 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 Interior Blue Soviet on the colour wheel See Electric Blue on the colour wheel
All matches: Interior Blue Soviet equivalents · Electric Blue equivalents