Abaddon Black vs Glossy Sea Blue

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. Glossy Sea Blue is noticeably lighter, more saturated than Abaddon Black.

Can I use Glossy Sea Blue instead of Abaddon Black?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Glossy Sea Blue is noticeably lighter, more saturated than Abaddon Black.

Can I use Abaddon Black instead of Glossy Sea Blue?

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