hyacinthine

a. [ L. hyacinthinus, Gr. &unr_;. ] Belonging to the hyacinth; resembling the hyacinth; in color like the hyacinth. Milton. [ 1913 Webster ]

His curling locks like hyacinthine flowers. Cowper. [ 1913 Webster ]

The hyacinthine boy, for whom
Morn well might break and April bloom. Emerson.