IPA: /ˈɪndɪɡɔɪd/
KK: /ɪnˈdɪɡɔɪd/
Relating to or resembling indigo, especially in color or structure.
The artist chose an indigoid shade for the background of her painting.
Indigoid is formed from "indigo" (from Latin "indicum", meaning the indigo plant or dye) and "-oid" (meaning resembling or like). The word "indigoid" refers to something that resembles or is similar to indigo, particularly in color.
Think of the word 'indigo' as a color, and remember that 'indigoid' means something that is similar to that color.