Okay, Darksaber... you've made your point and I believe you are correct.
The Ultron drones have the capability of being either blue or red, depending on their link to Ultron Prime. Ultron Prime is always red, to the best of my recollection. That much is established in the film. It's not like I'm trying to make them green or purple, which is something that has not been established. However, what the film does not address is what happens to Ultron Prime when he is controlling a drone... does Ultron Prime then turn blue? Can Ultron Prime control multiple drones at one time, turning them all red? These answers are unclear and thus, my image of all red drones is not impossible or disproven by the events in the film.
I suppose the real question now is...
what works better for my design?I find the blue on the drones to distract from Ultron Prime... my eyes go right to the drones instead of to Ultron himself. I also feel the blue breaks from the color palette of the back design and "cools down" an image that is meant to be fiery, menacing, and threatening.
If I indeed go with the red, I apologize to everyone who feels it ruins the cover.
