Regal Blue vs Altdorf Guard Blue

How close are they?

ΔE 5.6, very close: most people won’t see a difference side by side. Altdorf Guard Blue is warmer than Regal Blue.

✓ Herrick Games paint comparison chart lists these two as equivalents.

Can I use Altdorf Guard Blue instead of Regal Blue?

Yes, for most jobs. Very close match (ΔE 6). Altdorf Guard Blue is warmer than Regal Blue.

Can I use Regal Blue instead of Altdorf Guard Blue?

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