Royal Blue vs Calgar Blue

How close are they?

ΔE 5.8, very close: most people won’t see a difference side by side. Calgar Blue is a little lighter, more muted than Royal Blue.

Can I use Calgar Blue instead of Royal Blue?

Yes, for most jobs. Very close match (ΔE 6). Calgar Blue is a little lighter, more muted than Royal Blue.

Can I use Royal Blue instead of Calgar Blue?

The same difference applies the other way round: Royal Blue is a little darker, more saturated.

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.