Lothern Blue vs French Blue

How close are they?

ΔE 7.1, close: similar, with a visible difference side by side. French Blue is more saturated than Lothern Blue.

Can I use French Blue instead of Lothern Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). French Blue is more saturated than Lothern Blue.

Can I use Lothern Blue instead of French Blue?

The same difference applies the other way round: Lothern Blue is 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.