Sometimes that confusion can stem from bots having other bots colour schemes.
Looking at Energon Downshift - was obviously meant to be Wheeljack from the head sculpt and colour scheme, but since they used Wheeljack in Aramada they just gave the toy a different name. Hence why I liked Cybertron Downshift a lot better, at least he was a different colour.
Age of Extinction Hot Shot is the worst. His colour scheme is completely Tracks - from the blue body to red face and white helmet. But they named him Hot Shot for whatever reason. If they are going to do that, why not just decide to make the toy yellow? If because of all the Bbees on the shelf then make him that light bluish colour he had in Cyberteron and without the red face? As it is we ended up with a toy named Hot Shot who was doing a credible Tracks impersonation
Getting to the actual question of this thread, it really depends on the toy for me. I like the contrast between the green and purple of the Constructicons. I also love the colour scheme on Nemesis Rodimus Prime. I thought whoever that white Diaclone version of MP Sunstreaker should have been a Decepticon - that white with red eyes could have worked for an evil character so well!![]()