Prometheus was the son of two career criminals who traveled the country committing thefts and murders until the pair was gunned down by the Police.
In a reversal of Batman’s origin, Prometheus vowed to “annihilate the forces of justice” in honor of his parents.
The DC Universe has a long history of heroes traveling from alternate Earths many times to stay or just for a quick team up.
It all began with the original team up of Barry Allen and Jay Garrick, the Flashes of their respective Earths One and Two.
His style is dark with bright color. Superman’s suit is brighter, the tone is different with that.
From what we can see it is bright but still shows color and still has a grey tint.