In an attempt to reduce inconsistencies and confusion, as well as to increase overall gameplay quality and distinction for the Color Madness gamemode, I made a chart of which items are allowed for which color.
I specifically designed it so that any one item has no more than 2 assigned colors. This is to prevent certain items from being built on everyone (redemption for example) and to increase the distinction for each Color. I was tired of seeing items like Runaan's Hurrican being built by users of Red, Orange, Yellow, Silver, White. It ruins a color's defining traits and makes it so it doesn't really matter which color you pick.
If you have any suggestions on items to change, please don't hesitate to recommend. But remember, you have to be able to remove it from an already existing color slot if you want to add it to a new one.