Anyway Rollbit is open for suggestions thus if the gambler raise this feedback to them they will certainly do something to improve it in the future.
Only if a handful amount of people actually complaint about this but for some reason this is probably the first time that someone actually complain about the layout / colour scheme of the site. It doesnt and wont really affect anything while you gamble on the site so I kinda doubt that Rollbit will do something about it even if he raises his concern onto them
Some gamblers are very attentive when it comes to the design of the games and the site, and yes if theres no enough complaint probably Rollbit will just ignore it but that is not final yet. They might do some update but if its under the game provider, it will be hard to adjust it for Rollbit. This site becomes more popular because of their innovation, and probably its their focus than to improve the design and color of the site, Id prefer an update like this than to change any design which doesnt affect my gambling activities.