I find it fascinating that out of all the hulks in the game, none of them use yellow. Even 5* Hulk/Banner cover 5 colors between them and still doesn’t have yellow.
Is there anything in the comics that explains if the yellow color or something that counters gamma radiation?
Will we ever get a hulk type character that has yellow?
I think the Green guys hating/fearing Yellow is more a DC thing.
Yellow using “hulk type” coming right up… 
Although the Hulks have been on teams, it’s not their strong suits. The lack of yellow which are generally team oriented powers is probably meant to reflect that.
I don’t think it’s a coincidence that Doom and Banner share colors (could even extend to OBW ). I think it reflects A) play style B) “personality”. They are intelligent and strategic in place of sheer power. When banner transforms, his colors change to red (aggressive) and green (defining Hulk trait). Just my opinion.
You think you know whatever Hulk you fight with.
The Hulk is just a green thing you can smash.
But I know every Banner, Ross, and Walters
And Cho, now that his powers aren’t trash.
You think the only tiles meant for Hulk fights
Are green and red and purple, sometimes blue
But if you are a Hulk who gets some yellow
You’ll learn there are things that Hulks just cannot do.
Have you ever seen the Hulk fight with a yellow tile?
Or asked the grumpy Logan why he sulks?
Can you sing with all the voices of the mountain?
Can you paint with all the colors of the Hulks?
Can you paint with all the colors of the Hulks?
Amazing 