Sorry, but how came that the “CRIMSON bands of Cyttorak” is actually a BLUE power? 
You could even have made it purple, exchanging it with the “Eye of Agamotto” (that is GREEN, by the way
)
Scarlet Witch doesn’t have a red skill. Green Goblin doesn’t have a green skill. Black suit Spidey doesn’t have a black, and neither does 1* or 3* Black Widow. Of course, then they went and gave Black Bolt a black skill. Still, the overall record of devs using character appropriate colors is pretty nonsensical.
Character colors are more based on how the mechanics work (like in Magic the gathering) and not about the character costumes. Crimson Bands is what the power looks like, but what it does is a “blue” effect.
Yes, I understood the “Magic” logic, it just sounded strange (ha-ha).
Scarlet Witch is dressed in scarlet, Green Goblin is green, and so on. None of these are powers, they are dresses or names.
That power “uses” the crimson bands, so it would have more sens to be red.