ΔE 10.8, fair: the same colour family, but not a straight swap. Ivory RLM05 is more muted, cooler than Webbing Khaki.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ivory RLM05 is more muted, cooler than Webbing Khaki.
The same difference applies the other way round: Webbing Khaki 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 Webbing Khaki on the colour wheel See Ivory RLM05 on the colour wheel
All matches: Webbing Khaki equivalents · Ivory RLM05 equivalents