Slate Grey vs Saddle Brown

How close are they?

ΔE 13.8, fair: the same colour family, but not a straight swap. Saddle Brown is a little lighter, more saturated than Slate Grey.

Can I use Saddle Brown instead of Slate Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Saddle Brown is a little lighter, more saturated than Slate Grey.

Can I use Slate Grey instead of Saddle Brown?

The same difference applies the other way round: Slate Grey is a little 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.