SB 3.12.15
ity adistah sva-guruna
bhagavan nila-lohitah
sattvakrti-svabhavena
sasarjatma-samah prajah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The most powerful Rudra, whose bodily color was blue mixed with red, created many offspring exactly resembling him in features, strength and furious nature.