Green Brown vs Sand Yellow RLM79

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Sand Yellow RLM79 is a little lighter, warmer than Green Brown.

Can I use Sand Yellow RLM79 instead of Green Brown?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Sand Yellow RLM79 is a little lighter, warmer than Green Brown.

Can I use Green Brown instead of Sand Yellow RLM79?

The same difference applies the other way round: Green Brown is a little darker, 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.