C.P. Cadmium Red Dark vs Amaranth Red

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Amaranth Red is noticeably lighter than C.P. Cadmium Red Dark.

Can I use Amaranth Red instead of C.P. Cadmium Red Dark?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Amaranth Red is noticeably lighter than C.P. Cadmium Red Dark.

Can I use C.P. Cadmium Red Dark instead of Amaranth Red?

The same difference applies the other way round: C.P. Cadmium Red Dark is noticeably darker.

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.