Osram offers both the Cool Blue Intense (~6K) and the Cool Blue Boost (~7K), however the latter supposedly aren't road legal although you can still buy them. But, there's a reason most don't go past that: there's no benefit and at the cost they're asking, most buyers will want the best performing, not the most blue/purple/etc. Also, I wouldn't group Morimoto alongside Philips or Osram, but that's just me.
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