What an irony – Hinduism’s colour is orange, just a shade away from the red of blood.
This for perhaps the only major religion in the world to advise non-violence towards all living beings.
And Islam’s colour is green, a peaceful, content, agrarian green - for a religion that has had to fight every step of its way to definition and determination.

(P.S. - this is not to imply that Islam is a militant religion or anything. Remember that a lot of Indians embraced Islam because they found it to be more humanitarian than the caste-ridden shackles of Hinduism)