Light Ultramarine vs Oxford Blue

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Oxford Blue is more saturated than Light Ultramarine.

Can I use Oxford Blue instead of Light Ultramarine?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Oxford Blue is more saturated than Light Ultramarine.

Can I use Light Ultramarine instead of Oxford Blue?

The same difference applies the other way round: Light Ultramarine 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.