Black on blue has been a part of his design since the beginning. One of my favorite looks was his DCAU Reign look.
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His tee shirt and jeans look carries over the black, blue, and red color scheme. Personally if he's going to wear a tee shirt I would have preferred the Fleischer S on blue shirt that Superman wore in Yang's Truth arc. It has the colors and makes him stand out a bit more. It's also a good visual short hand if his dealing with street level crime.