Hi @Anonymous User
In my opinion I doubt the nowtv white box will ever support the Hayu nowtv pass, due to it's older generation slower processor and limited amount on in built memory.
If you are worried about having all the same matching colours, where I am assuming you are using the HDMi port off the white nowtv box.
Then what about a nowtv stick which you could hide the stick behind the TV and the remote doesn't need line of sight to work like the white box.
