ΔE 11.4, fair: the same colour family, but not a straight swap. Lemon Yellow is a little lighter, cooler than Space Dust.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Lemon Yellow is a little lighter, cooler than Space Dust.
The same difference applies the other way round: Space Dust 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 Space Dust on the colour wheel See Lemon Yellow on the colour wheel
All matches: Space Dust equivalents · Lemon Yellow equivalents