No religion makes more use of color than Hinduism, with its blue-skinned gods and peony-lipped goddesses, and even the spring festival of Holi is focused on color: Boys squirt arcs of dyed water on passersby or dump powder, all violently hued, on their marks.
Go to any Shinto temple in Japan and you'll see it: a simple stand from which hang hundreds of wooden postcard-size plaques with a colorful image on one side and, on the other, densely scribbled Japanese characters in black felt-tip pen, pleas to the gods for help or succor.