Bismuth Yellow vs Lemon Yellow

How close are they?

ΔE 14.2, fair: the same colour family, but not a straight swap. Lemon Yellow is cooler than Bismuth Yellow.

Can I use Lemon Yellow instead of Bismuth Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Lemon Yellow is cooler than Bismuth Yellow.

Can I use Bismuth Yellow instead of Lemon Yellow?

The same difference applies the other way round: Bismuth Yellow is 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.