Tenebrous Grey vs Abaddon Black

How close are they?

ΔE 12.8, fair: the same colour family, but not a straight swap. Abaddon Black is noticeably darker, more muted than Tenebrous Grey.

Can I use Abaddon Black instead of Tenebrous Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Abaddon Black is noticeably darker, more muted than Tenebrous Grey.

Can I use Tenebrous Grey instead of Abaddon Black?

The same difference applies the other way round: Tenebrous Grey is noticeably 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.