ΔE 12.1, fair: the same colour family, but not a straight swap. Ice Yellow is a little lighter, more muted, warmer than Rotten Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Ice Yellow is a little lighter, more muted, warmer than Rotten Yellow.
The same difference applies the other way round: Rotten Yellow is a little darker, more saturated, 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 Rotten Yellow on the colour wheel See Ice Yellow on the colour wheel
All matches: Rotten Yellow equivalents · Ice Yellow equivalents