Do you prefer Themed provably fair casinos or not. By themed I mean like Tower bet or bitkong style. What are some of the best themed platforms? Any new ones?
Not sure if I checked bitkong but I think I have visited tower bet once, long time ago. I know this website is in dark color but what you mean by themed casinos is that you can change the color of the whole page?
No, I don't believe he was referring to the color tone on the website.

Considering the examples the OP provided, it appears he is talking about a custom provably fair casino games that were developed in-house by the casino. Those games have certain advantages. For instance, they are unique and specific to that particular casino and often have custom designed features.
Themed Provably Fair casinos are just basically casinos where their main idea / imagery was from a casino game. Towerbet, in example, is from the tower game itself. Themed casinos' doesn't pertain to the general connotation of the word "theme" that pertains to the overall look of the platform of website, but rather something like a