Page "Amaranth" Paragraph 79

The flowers of the ' Hopi Red Dye ' amaranth were used by the Hopi ( a tribe in the western United States ) as the source of a deep red dye.

There is also a synthetic dye that has been named " amaranth " for its similarity in color to the natural amaranth pigments known as betalains.

This synthetic dye is also known as Red No. 2 in North America and E123 in the European Union.