I have a 5m Belkin network 'patch cable' that is in boring grey (£10 from Argos about 5 years ago). I might 'upgrade' it to a total overkill Cat 6e Belkin cable in a loud blue to match my next purchase (the clue is in the colour and my jumpers). Or I might go for bright canary yellow for the contrast.
I also need a couple of TDK ferrites (11mm internal diameter) and a little screw-on bracket for my new Airport Express so it can go - invisibly - behind/under the system but not on the floor or dangling somewhere halfway.
Then it'll be a white MK Safety plug and a white fig. 8 mains lead that I can shorten to the correct length (the Apple one is too long). Then, if I sell it, the customer can still have the original.