The Incredible Hulk was originally gray, not green.
Stan Lee’s initial vision for the monstrous hero was tinted a politically correct shade of gray because he did not want to allow room for any misguided inferences about the ethnicity of the beastly superhuman. However, the printing press had difficulty getting the gray tone to print properly, so Lee changed his skin color to the green we have all come to know and love. Over the years, the Hulk has appeared in many different shades of green, as a bizarre Russian red version, and has even reverted back to his original grayish hue! No matter the color, you definitely don’t want to be the reason that this brute is ‘seeing red’, because you won’t like him when he’s angry.
Sources: (1, 2)
