indigotin

[in-dig-uh-tin, in-di-goht-n] /ɪnˈdɪg ə tɪn, ˌɪn dɪˈgoʊt n/
noun
1.
indigo blue (def 2).
Origin
1830-40; indigot(ic) + -in2
British Dictionary definitions for indigotin

indigotin

/ɪnˈdɪɡətɪn; ˌɪndɪˈɡəʊ-/
noun
1.
another name for indigo (sense 1)
Word Origin
C19: from indigo + -in