Tesla Blue vs Royal Blue

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Royal Blue is more muted, cooler than Tesla Blue.

Can I use Royal Blue instead of Tesla Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Royal Blue is more muted, cooler than Tesla Blue.

Can I use Tesla Blue instead of Royal Blue?

The same difference applies the other way round: Tesla Blue is more saturated, 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.