Initially Hulk should have been gray. Stan Lee took gray because he doesn´t wanted Hulk assign any ethnic group. (This is incomprehensible, since most of Marvel superheroes are white.) Due to problems with printing, Stan Lee had to choose a different color. He chose green. Then it took an explanation for the color change. Hulk should have chloroplasts in the skin, which used the sun as an energy source. So Hulk is green because there were problems with printing and not because it was planned that way. Grey is a color that can not work well in movies. Hulk would act as a bloodless, a living dead or vampire. Green is better, but on the other hand, this color looks a bit weird.
So if Hulk was originally planned as gray, wouldn´t it be better if he were skin-colored?
What do you think?
Here are some examples of how it would look like: