For anyone who might believe that there is anything NOT calculated about the public appearances and performances of the Clintons, let this be an example of the lengths to which they go in the way of advanced planning. Handlers are seen here “sampling” a variety of her famed pantsuits to see how they look with the lighting in the Pepsi Center and the DNC stage backdrop.
By way of commentary, the two on the left wash out with the color of the backdrop. And, as for the red one, it might conjure up too many notions of “red states” and then there is that whole spiritual realm thing that red associates with. So, the choice was pretty obvious, t-sip orange, which is what she wore.