ΔE 14.7, fair: the same colour family, but not a straight swap. Imperial Gold is noticeably lighter, more saturated than Light Bronze.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Imperial Gold is noticeably lighter, more saturated than Light Bronze.
The same difference applies the other way round: Light Bronze 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 Light Bronze on the colour wheel See Imperial Gold on the colour wheel
All matches: Light Bronze equivalents · Imperial Gold equivalents