Lemon Yellow vs Phalanx Yellow

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Phalanx Yellow is a little lighter than Lemon Yellow.

Can I use Phalanx Yellow instead of Lemon Yellow?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Phalanx Yellow is a little lighter than Lemon Yellow.

Can I use Lemon Yellow instead of Phalanx Yellow?

The same difference applies the other way round: Lemon Yellow is a little darker.

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.