Rich, plum-colored as the lip of a tropical flower.
Gloxinia is a medium purple, close to plum.
It can be described as medium, moderate, rather unsaturated and purplish.
Set in white, because white reads best on it.
Gloxinia is a genus containing three species of tropical rhizomatous herbs in the flowering plant family Gesneriaceae. The species are primarily found in the Andes of South America, but Gloxinia perennis is also found in Central America and the West Indies, where it has probably escaped from cultivation.
Read on WikipediaSinningia speciosa, sometimes known in the horticultural trade as gloxinia, is a tuberous member of the flowering plant native to Brazil within the family Gesneriaceae. Originally included in the genus Gloxinia in 1817, it was reclassified to Sinningia. Showy S. speciosa hybrids are still sometimes referred to simply as "gloxinia", although this name is now technically incorrect.
Read on WikipediaProper noun