I see the market didn't look very favorably on funny colors so they showed up here instead. Would probably buy a pair if in black, but not really down with the rainbow choices.
AtomkinderThey're meant to match those Sony phones; these have been their colors for awhile now.
They have many phones and headphones this color but I agree I would probably purchase if they had black.
I really want the wh1000xm2, I regret not purchasing those. Pretty much these but over ear instead of on ear.