Magenta vs Witch Purple

How close are they?

ΔE 12.3, fair: the same colour family, but not a straight swap. Witch Purple is a little darker, more muted than Magenta.

Can I use Witch Purple instead of Magenta?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Witch Purple is a little darker, more muted than Magenta.

Can I use Magenta instead of Witch Purple?

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

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.