Light Yellow vs Space Dust

How close are they?

ΔE 14.7, fair: the same colour family, but not a straight swap. Space Dust is noticeably lighter, more muted than Light Yellow.

Can I use Space Dust instead of Light Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Space Dust is noticeably lighter, more muted than Light Yellow.

Can I use Light Yellow instead of Space Dust?

The same difference applies the other way round: Light Yellow is noticeably darker, more saturated.

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.