Innsmouth Blue vs USAF Light Blue

How close are they?

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

Can I use USAF Light Blue instead of Innsmouth Blue?

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

Can I use Innsmouth Blue instead of USAF Light Blue?

The same difference applies the other way round: Innsmouth 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.