The chain appears to have taken inspiration from a box of crayons.
KFC China is dealing with a sales slump. So what is a struggling chain to do? Dye its buns strange colors, of course. The unnaturally colored bun burger is a menu item that has also been tested by Burger King Japan. The pink sandwich is described as "rose cheese chicken leg roasted burger," and the ad features rose petals, while the black sandwich is known as the "black diamond bacon spicy chicken leg burger." Who wants bread to be bread-colored anyway?
KFC China Thinks People Want to Eat Pink and Black Buns - Eater