Reef-building polyp, orange as the inside of a conch shell.
Coral is a bright orange.
It can be described as bright, vivid, brilliant and glowing.
Set in black, because black reads best on it.
Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
Read on WikipediaThe various tones of the color coral are orange, red and pink representations of the colors of those cnidarians known as precious corals.
Read on WikipediaProper noun