Pale Yellow vs Hexos Palesun

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Hexos Palesun is more saturated, cooler than Pale Yellow.

Can I use Hexos Palesun instead of Pale Yellow?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Hexos Palesun is more saturated, cooler than Pale Yellow.

Can I use Pale Yellow instead of Hexos Palesun?

The same difference applies the other way round: Pale Yellow is more muted, 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.