Crystal Blue vs Relic Blue

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Relic Blue is a little lighter, more muted, cooler than Crystal Blue.

✓ Two Thin Coats comparison chart lists these two as equivalents.

Can I use Relic Blue instead of Crystal Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Relic Blue is a little lighter, more muted, cooler than Crystal Blue.

Can I use Crystal Blue instead of Relic Blue?

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