ΔE 13.0, fair: the same colour family, but not a straight swap. Light Blue is noticeably lighter, more saturated than Shieldwall Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Blue is noticeably lighter, more saturated than Shieldwall Blue.
The same difference applies the other way round: Shieldwall Blue is noticeably 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 Shieldwall Blue on the colour wheel See Light Blue on the colour wheel
All matches: Shieldwall Blue equivalents · Light Blue equivalents