TL;DR
item based train colors for the standardizing sticklerWhat ?
most of us use trains to carry mass quantities of one item. to represent train groups we have RGB color sliders but that can feel too broad for the one and done. if you could select an item to "theme" your train, it would feel more official than guess and check with the RGB sliders even if it is just an RGB autosetthis also dose not have to be an in game option ether. just a list in the forums of official train colors would be nice to reference