The problem as I see it with peacocks is that you can't be "exactly" sure about them unless the person you got them from is "exactly" sure and a trustworthy individual. One can mix with another and then through fry that look like an array of colors inbetween what each of the parents work, some looking like proper parent 'A' and others like proper parent 'B', despite them all being a mix.

Where did you get him from?
IMO it's not nearly dark enough for a german red.
Benga and sunshine are good guesses.