ΔE 11.9, fair: the same colour family, but not a straight swap. Yellow RLM04 is more muted, cooler than Pure Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Yellow RLM04 is more muted, cooler than Pure Orange.
The same difference applies the other way round: Pure Orange is more saturated, warmer.
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 Pure Orange on the colour wheel See Yellow RLM04 on the colour wheel
All matches: Pure Orange equivalents · Yellow RLM04 equivalents