Hell Bent for Leather vs USAF Light Blue

How close are they?

ΔE 16.3, loose: different enough that you should pick on purpose. USAF Light Blue is a little lighter, more saturated than Hell Bent for Leather.

Can I use USAF Light Blue instead of Hell Bent for Leather?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). USAF Light Blue is a little lighter, more saturated than Hell Bent for Leather.

Can I use Hell Bent for Leather instead of USAF Light Blue?

The same difference applies the other way round: Hell Bent for Leather is a little darker, 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.