ΔE 11.8, fair: the same colour family, but not a straight swap. Moon Dust is a little lighter, more saturated than Light Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Moon Dust is a little lighter, more saturated than Light Yellow.
The same difference applies the other way round: Light Yellow is a little darker, 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 Light Yellow on the colour wheel See Moon Dust on the colour wheel
All matches: Light Yellow equivalents · Moon Dust equivalents