Hansa Yellow Opaque vs Lemon Yellow

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Lemon Yellow is noticeably darker, more muted than Hansa Yellow Opaque.

Can I use Lemon Yellow instead of Hansa Yellow Opaque?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Lemon Yellow is noticeably darker, more muted than Hansa Yellow Opaque.

Can I use Hansa Yellow Opaque instead of Lemon Yellow?

The same difference applies the other way round: Hansa Yellow Opaque is noticeably lighter, 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.