Anthracite Gray vs USAF Light Blue

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. USAF Light Blue is more saturated than Anthracite Gray.

Can I use USAF Light Blue instead of Anthracite Gray?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). USAF Light Blue is more saturated than Anthracite Gray.

Can I use Anthracite Gray instead of USAF Light Blue?

The same difference applies the other way round: Anthracite Gray is more muted.

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.