Abaddon Black vs Umber Ink

How close are they?

ΔE 6.1, close: similar, with a visible difference side by side. Umber Ink is more saturated than Abaddon Black. They are different kinds of paint: Citadel Abaddon Black is an opaque base/layer paint and Nocturna Models Umber Ink is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.

Can I use Umber Ink instead of Abaddon Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Umber Ink is more saturated than Abaddon Black. They are different kinds of paint.

Can I use Abaddon Black instead of Umber Ink?

The same difference applies the other way round: Abaddon Black is 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.