Imp Yellow vs Sand Yellow

How close are they?

ΔE 13.5, fair: the same colour family, but not a straight swap. Sand Yellow is a little darker, more saturated than Imp Yellow.

Can I use Sand Yellow instead of Imp Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sand Yellow is a little darker, more saturated than Imp Yellow.

Can I use Imp Yellow instead of Sand Yellow?

The same difference applies the other way round: Imp Yellow is a little lighter, 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.