Dark Magenta vs Warlock Purple

How close are they?

ΔE 18.4, loose: different enough that you should pick on purpose. Warlock Purple is a little lighter, more muted, cooler than Dark Magenta.

Can I use Warlock Purple instead of Dark Magenta?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Warlock Purple is a little lighter, more muted, cooler than Dark Magenta.

Can I use Dark Magenta instead of Warlock Purple?

The same difference applies the other way round: Dark Magenta is a little darker, 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.