ΔE 10.2, fair: the same colour family, but not a straight swap. Light Orange is a little darker, more saturated, warmer than Ivory White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Light Orange is a little darker, more saturated, warmer than Ivory White.
The same difference applies the other way round: Ivory White 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 Ivory White on the colour wheel See Light Orange on the colour wheel
All matches: Ivory White equivalents · Light Orange equivalents