How to hide light-colored wires in a dark-colored cabinet?
There's stick-on wire chases that can be purchased.  I think the usual big box hardware stores carry them.  Slide the wire inside, peel off the sticky, and bury it in a corner.  You won't see it.  

Google plastic raceway cable organizers.  The first one that came up says it was available in black or ivory.  http://cableorganizer.com/economical-latching-raceway/