I'd wear black because…well just listen to Dr. Ian Malcom from Jurassic Park…
Actor Jeff Goldblum as Dr. Ian Malcom
“…In any case, I wear only two colors, black and gray.
Ellie was staring at him, her mouth open.
“These colors are appropriate for any occasion,” Malcom continued, “and they go well together, should I mistakenly put on a pair of gray socks with my black trousers.”
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And if I wore black only I couldn't put on the wrong socks or trousers! Admittedly it would be more dangerous riding my bicycle at night.