They don't make the 60 HE in white, but they did come out with white keycaps. In order to have a white case you'd have to swap to a third party case like a tofu or blade, Wooting has a compatability list. Swapping the case isn't too difficult at all and it's so much better than the flimsy plastic case it comes in. But it is an extra expense.

This is a blade 60 case the wooting 60 pcb is the same form factor as the dz60 pcb allowing it to fit in tofu and other tofu like cases