One of the most important colors used to paint Hanuman murtis (idols), images and sculptures is red. Ever wondered why Hanuman idol is painted in read? The idols are painted red for the good of Sri Ram.

One day a curious Hanuman asked Mata Sita, ‘Why are you smearing vermilion on your forehead and the parting of the hair?’
Sita replied, ‘It is for the good of Sri Ram.’
Hanuman, who always wanted to do something for Sri Ram, immediately took the vermilion powder and smeared it all over his body.
To a stunned Mata Sita, Hanuman said ‘If you have to wear a red dot on forehead to achieve good of Sri Ram, I need to smear my whole body with red paint to achieve the good of Sri Ram.
From that day, Lord Hanuman’s images are painted red.