Superman Blue was originally an alternate version of Superman from Earth-162 created when he used a mind enhancing machine powered by Kryptonite to increase his intelligence. The radiation caused Superman to split into two super-intelligent beings; the Superman Red and Superman Blue. Eventually, they saved the world together and married Lois Lane and Lana Lang respectively.
In the New Earth continuity, Superman used a Blue containment suit when he experienced a weird power fluctuation that rendered him in the form of pure energy. He found that he was considerably faster, intangible, and able to interact with computers in this energy form, and lost his vulnerability to Kryptonite.
In The New 52 reboot, the "Electric Blue" suit is shown inside a display case at the Fortress of Solitude. Clark's son, Jon Kent, received similar powers after being exposed to Lazarus Resin during the event Lazarus Planet.
Superman Blue was created by Leo Dorfman and Curt Swan, first appearing in Superman #162 (1963).
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