ΔE 12.6, fair: the same colour family, but not a straight swap. Chalice Red is a little lighter, more muted, warmer than Muddy Clay.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Chalice Red is a little lighter, more muted, warmer than Muddy Clay.
The same difference applies the other way round: Muddy Clay is a little darker, 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.
See Muddy Clay on the colour wheel See Chalice Red on the colour wheel
All matches: Muddy Clay equivalents · Chalice Red equivalents