Umberroot vs Amethyst Rose

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Amethyst Rose is a little darker, more saturated than Umberroot.

Can I use Amethyst Rose instead of Umberroot?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Amethyst Rose is a little darker, more saturated than Umberroot.

Can I use Umberroot instead of Amethyst Rose?

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

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.