ΔE 10.8, fair: the same colour family, but not a straight swap. Sand Yellow is a little lighter, cooler than Sandgelb RLM 79.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Sand Yellow is a little lighter, cooler than Sandgelb RLM 79.
The same difference applies the other way round: Sandgelb RLM 79 is a little darker, 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 Sandgelb RLM 79 on the colour wheel See Sand Yellow on the colour wheel
All matches: Sandgelb RLM 79 equivalents · Sand Yellow equivalents