I'm not going to say there's a type of science or psychological shit going on, that probably gets influenced by those colours. It looks more like those are two bright colours on the spectrum -- you may be wondering how black fits into this explanation, but that's exactly what it is. The uniqueness also counts as an advantage to attract and keep people wondering -- "to what extent does these colors go, with an unlimited space and interface" ??

Everything is possible, including owning yourself a casino later on. Infact, I'm beginning to think that you're building one so you just needed to confirm a color combination for it.