In Marvel Comics, green is often associated with gamma-mutated characters like the Hulk. However, when writer Jeph Loeb introduced the Red Hulk in 2008’s Hulk #1, a mystery remained about his red color. The reason for this lies in comic book lore and the creative decisions behind the character.
Red Hulk is not just red; he emits enough gamma radiation that it can be felt as heat. This unique property sets him apart from the Hulk, who gained his powers through exposure to gamma radiation. The difference between their origins led to the Red Hulk’s distinctive red color.
The origin story of the Red Hulk involves a cabal of supergenius villains turning Thaddeus Ross into a Hulk and offering to resurrect his daughter in exchange for cooperation. This plot twist is what resulted in Ross’ hulked-out form being infused with a different type of energy, giving him his red appearance.
It’s worth noting that the Red Hulk’s color was not chosen randomly. Stan Lee, Marvel’s former head, initially wanted the Hulk to be grey but had to settle for green due to printing limitations. Similarly, the Red Hulk’s color was influenced by “vibes” and the creative team’s desire to differentiate him from the original Hulk.
While some may find it unsatisfying that the Red Hulk is red, it’s essential to consider the context of comic book storytelling. The Hulk’s green color is not solely due to his gamma-mutated powers but also a product of the medium itself and the creative decisions made by Stan Lee.
Source: https://www.polygon.com/marvel/524402/why-is-hulk-red-captain-america-brave-new-world