Blue Flux vs Deep Sky Blue

How close are they?

ΔE 13.2, fair: the same colour family, but not a straight swap. Deep Sky Blue is a little darker, more muted, warmer than Blue Flux.

Can I use Deep Sky Blue instead of Blue Flux?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Deep Sky Blue is a little darker, more muted, warmer than Blue Flux.

Can I use Blue Flux instead of Deep Sky Blue?

The same difference applies the other way round: Blue Flux is a little lighter, more saturated, cooler.

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.