Too many colours will spoil it anyway. It looks gorgeous in its current colours. It’s amazing how Apple can make a glass back still look and feel premium when the S8 looks/feels plastic.
I would like to start a petition for a blue iPhone and it would be nice if the gold leaned towards a copper shade. The current blush gold is almost there, just a slight bit pink still.
You can certainly start a petition on Macrumors, but that's going to change Apple's plan a blue iPhone. Apple is more neutral based with their colors when it comes to silver, gold, rose gold, etc. However, blush gold was heavily rumored before the launch of the iPhone X, which still very well could happen for an upgraded color in the future.
I honestly pray that when the X plus comes out that It comes in the Gold color as well. I not really a fan of the Silver or Space Gray. I would like more color options.