Calth Blue Clear vs Ultramarine

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Ultramarine is more saturated, warmer than Calth Blue Clear.

Can I use Ultramarine instead of Calth Blue Clear?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ultramarine is more saturated, warmer than Calth Blue Clear.

Can I use Calth Blue Clear instead of Ultramarine?

The same difference applies the other way round: Calth Blue Clear is more muted, cooler.

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.