Hey there, welcome to the Boards! I really like this!
I agree that the bright red kinda breaks the colour scheme (it’s great that you can see it). Since you don’t have a gunmetal HF blaster, how about trying to add a bit more red throughout the model in order to distribute the colours more evenly?
In addition, I recommend photographing future MOCs on a clean featureless background. It’ll make your creations look 10x better. Check out this topic for some more tips on photography.
Edited title -legomaster