Air Superiority Blue vs Ulthuan Grey

How close are they?

ΔE 13.0, fair: the same colour family, but not a straight swap. Ulthuan Grey is more muted than Air Superiority Blue.

Can I use Ulthuan Grey instead of Air Superiority Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Ulthuan Grey is more muted than Air Superiority Blue.

Can I use Air Superiority Blue instead of Ulthuan Grey?

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