The color stage is the best one. Thats when the consumer-part of a product is “done” and they dont really know what to add except advertise more. The muted colors are when they have turned corporate and are trying to get into B2B deals, and consumers dont really matter as much any more. Then return to a mono-color when they try to trim anything unecessary to earn more money without getting more customers. And two-color choice when they need to convince investors that they “are still fresh and not out of ideas”.

besides, the third party skin and case industry is thriving

By thriving you mean the 3rdparties are only selling customization thingies for the most popular-selling products. Usually products that has gone so far into shittification that they are halfway filled with advertisement and B2B deals. Yay, I can put a red shell on my handheld advertising platform…