Even on these "black and silver Macs", macOS is much less corporate looking than Windows.
Also, Macs have also been gold for years, and apparently the new iMac colors are coming to MacBook Airs as well. The reason PC is "colorful" is because it's made by hundreds of competing companies, but I don't see HP ThinkPads or Dell XPS' or Microsoft Surfaces being in anything other than silver and black either. I did a quick check of the most popular non-gamer PC laptops, and they all have only black and silver options. Less than a Mac today, and that's before the color comeback we saw with iMac.