I just replied to a post about this. But I thought about it as a halloween skin (Dark Candy Kayn). And now that I think about it, the Fiddlesticks skin that this shares the theme with was Christmas...my mistake. But yes I agree.
The Scythe-shaped cane would have red and blue stripes, Kayn's model pre-transformation would have all this red and blue mixed on him. Once he transforms, the cane would become either blue-and-white or red-and-white to represent the form he has chosen. The models for the form would follow the same principle (meaning the main color of either form with white tones throughout the model).