A very small tip.
In Zwift I mostly use BMC Teammachine which color slider is broken so it’s always red and cannot change.
But if you select the BMC in your garage, then go to drop shop and select any other bike with a color slider (like CUBE TT bike etc), then change the color with the slider and leave the shop without purchasing it, you see that your Teammachine is in a different color now.
I am not sure but maybe this can be used for other frames with color slider bug such as Specialized Diverge.