Chimera Red vs Redwood Brown

How close are they?

ΔE 18.5, loose: different enough that you should pick on purpose. Redwood Brown is a little darker, warmer than Chimera Red.

Can I use Redwood Brown instead of Chimera Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Redwood Brown is a little darker, warmer than Chimera Red.

Can I use Chimera Red instead of Redwood Brown?

The same difference applies the other way round: Chimera Red is a little lighter, 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.