As far as I am aware, Yamaha don't do ANYTHING in white!
They used various shades of silver/aluminium for one of their 'P' models and especially for their Motif range but even then, Yamaha has gone back to black for their newest Motif XF range.
Some models, like Kawai for example, use a light silver colour for at least one model of their stage pianos but it's a Yamaha you want....
http://uk.yamaha.com/en/products/musica ... mode=model.
However, it's a CLP, which means that you can only record a maximum of 2 tracks per song. For multi-track recording, you need a CVP, so the choice is either a white piano which doesn't do what you want or something in a different colour which does what you want.