ΔE 12.9, fair: the same colour family, but not a straight swap. Light Pink is noticeably darker, more saturated than Light Magenta.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Pink is noticeably darker, more saturated than Light Magenta.
The same difference applies the other way round: Light Magenta is noticeably lighter, 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 Light Magenta on the colour wheel See Light Pink on the colour wheel
All matches: Light Magenta equivalents · Light Pink equivalents