Raw Wool vs Bright Brown Grey

How close are they?

ΔE 15.0, loose: different enough that you should pick on purpose. Bright Brown Grey is more muted, warmer than Raw Wool.

Can I use Bright Brown Grey instead of Raw Wool?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Bright Brown Grey is more muted, warmer than Raw Wool.

Can I use Raw Wool instead of Bright Brown Grey?

The same difference applies the other way round: Raw Wool is more saturated, cooler.

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.