Highlights from Nampiḷḷai's Vyākhyānam as documented by Vadakkuth Thiruvīdhip Piḷḷai
vaṇṇam ... - One who possesses a form that resembles a costly and exquisitely colored precious gem.
vaṇṇa mā Maṇic Chōdhiyai - vaṇṇam - color; mā - blackish blue; this could also signify Emperumān radiating the brilliance of a blackish-blue gem.
Further, those