ΔE 13.4, fair: the same colour family, but not a straight swap. Light Blue Green is warmer than Interior Blue Soviet.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Blue Green is warmer than Interior Blue Soviet.
The same difference applies the other way round: Interior Blue Soviet is 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 Interior Blue Soviet on the colour wheel See Light Blue Green on the colour wheel
All matches: Interior Blue Soviet equivalents · Light Blue Green equivalents