Blood for the Blood God vs Burnt Umber

How close are they?

ΔE 41.4, loose: different enough that you should pick on purpose. Burnt Umber is a little darker, much more muted, warmer than Blood for the Blood God.

Can I use Burnt Umber instead of Blood for the Blood God?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 41). Burnt Umber is a little darker, much more muted, warmer than Blood for the Blood God.

Can I use Blood for the Blood God instead of Burnt Umber?

The same difference applies the other way round: Blood for the Blood God is a little lighter, much 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.