Fuchsia vs Warlord Purple

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Warlord Purple is a little darker, more muted than Fuchsia.

Can I use Warlord Purple instead of Fuchsia?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Warlord Purple is a little darker, more muted than Fuchsia.

Can I use Fuchsia instead of Warlord Purple?

The same difference applies the other way round: Fuchsia 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.