ΔE 10.7, fair: the same colour family, but not a straight swap. Ivory RLM05 is a little darker, more saturated than Putrid Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ivory RLM05 is a little darker, more saturated than Putrid Green.
The same difference applies the other way round: Putrid Green is a little 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 Putrid Green on the colour wheel See Ivory RLM05 on the colour wheel
All matches: Putrid Green equivalents · Ivory RLM05 equivalents