Russian Blue Base vs Matt Black

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Matt Black is much more muted than Russian Blue Base.

Can I use Matt Black instead of Russian Blue Base?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Matt Black is much more muted than Russian Blue Base.

Can I use Russian Blue Base instead of Matt Black?

The same difference applies the other way round: Russian Blue Base is much 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.