Runic Grey vs Bright Slate Grey

How close are they?

ΔE 14.9, fair: the same colour family, but not a straight swap. Bright Slate Grey is noticeably lighter, more muted than Runic Grey.

Can I use Bright Slate Grey instead of Runic Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Bright Slate Grey is noticeably lighter, more muted than Runic Grey.

Can I use Runic Grey instead of Bright Slate Grey?

The same difference applies the other way round: Runic Grey is noticeably darker, 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.