One comes across varied information about Hanuman’s true form. He is mostly red and rarely black. ‘Red’ Hanuman is one who is smeared with sindur (vermilion). Saturn’s (Shani’s) influence may have resulted in His black complexion. Hanuman is popular as an incarnation of Rudra or as the son of Rudra. The red complexioned Rudra has perhaps influenced Hanuman’s complexion too. When Hanuman became red in complexion, tales of His love for sindur gained popularity.
Chant and Arti of Shri Hanuman
Shri hanuman – Videos