Dark Shadow Flesh vs Chalice Red

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Chalice Red is a little lighter, cooler than Dark Shadow Flesh.

Can I use Chalice Red instead of Dark Shadow Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Chalice Red is a little lighter, cooler than Dark Shadow Flesh.

Can I use Dark Shadow Flesh instead of Chalice Red?

The same difference applies the other way round: Dark Shadow Flesh is a little darker, warmer.

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.