Omega Blue vs Beaten Purple

How close are they?

ΔE 25.5, loose: different enough that you should pick on purpose. Beaten Purple is much more saturated, warmer than Omega Blue.

Can I use Beaten Purple instead of Omega Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Beaten Purple is much more saturated, warmer than Omega Blue.

Can I use Omega Blue instead of Beaten Purple?

The same difference applies the other way round: Omega Blue is much more muted, 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.