You’re just making it harder for yourself, trying to make things like Sibelius. When I started using Dorico I was eager for the different color scheme. The constant subtle reminders that this is not my old software are helpful.
RZDorico, Mark Johnson’s advice is pretty sound. Whichever colors you use, just make sure Groups and Links use different ones, since the two concepts function and behave differently. I also came from Sibelius (and before that, Finale, which I think also used orange a lot) and I just left all Dorico’s defaults on. It made it easy for me to just learn the new software at interface-value.