Elven Armour vs Amethyst Purple

How close are they?

ΔE 24.4, loose: different enough that you should pick on purpose. Amethyst Purple is a little darker, much more muted, warmer than Elven Armour.

Can I use Amethyst Purple instead of Elven Armour?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Amethyst Purple is a little darker, much more muted, warmer than Elven Armour.

Can I use Elven Armour instead of Amethyst Purple?

The same difference applies the other way round: Elven Armour is a little lighter, much 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.