Johto too. In addition to that on the Gameboy Color the cities color palette would change to a color close to matching that cities color namesake. Finally it wasn't just the cities names after colors but also the Kanto Badges in Japan. And yes, all the badges colors matched the cities color.Just noticed something-the towns in the kanto region are all named after colours. That explains why it is er...more colourful...I like that.
Two more fun naming facts:
1. Unova is the only other region which cities have a naming theme, but for Unova they'll all named after types of clouds.
2. Not really a fun fact but something I like, Kalos has a name for each of its routes. While everyone still calls them by their number, I still like the little touch, it gives the route a touch of personality. Maybe later I'll go through them and pick any which stand out to me. Eitherway I hope they do that for future games (though sadly they didn't go back and do the same for ORAS routes).