Demon Purple vs Luftwaffe Uniform

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Luftwaffe Uniform is a little darker, more muted, cooler than Demon Purple.

Can I use Luftwaffe Uniform instead of Demon Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Luftwaffe Uniform is a little darker, more muted, cooler than Demon Purple.

Can I use Demon Purple instead of Luftwaffe Uniform?

The same difference applies the other way round: Demon Purple is a little lighter, 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.