DEDR entry 3680
Tamil
niṟa (-pp-, -tt-) to take on colour as fruits or leaves, deepen in colour, be distinguished, brilliant, be bright and fresh in appearance
niṟam colour, complexion, dye, tincture, quality, property, temper, nature, light, lustre, fame, reputation
Malayalam
niṟam colour, light, splendour
niṟakka to shine
Kota
nerm (obl.nert-) colour. DED 3047