Superhero Color Theory
Primary Heroes
Here is a list of colors and what they traditionally mean:
We usually see heroes with two main colors and one accent color (ignoring that black is used to outline everything from heroes to handbaskets). Double colors is where it gets interesting. In this installment of Superhero Color Theory, we’re going to look at how the primary colors affect how we perceive our favorite heroes.
Red and Blue
Some of the biggest names in comics are primarily red and blue. The red means they are bold, passionate, and determined, but grounded with blue’s depth, wisdom and confidence. You might say Spider-Man is too angsty to be confident, but he does seem confident enough to crack jokes while cracking skulls.
Red and Yellow
The next most popular heroic primary combination is red and yellow and tend to be dynamic light-hearted heroes. They combine the exciting bold passion of red with the energy and ostentatious nature of yellow. They’re often the cockier, showoff types of hero. The yellow signals that safety has arrived, but the red and yellow becomes a dancing fire.
Blue and Yellow
Blue and yellow is the last pair of primary colors, for characters a bit on the outside. They lack the red boldness of those seeking or destined to be front and centre. Like the police, their blue uniforms convey they are heroes (trust, confidence), which has the other blue traits of depth and wisdom. The yellow shows they have energy to fight, and that they offer a safe place, like the light from a lighthouse. 
