Were I to do one of these, I'd paint the case white. I could do that and the dying now, but the logo would still be beyond me.
Though, even if I think the idea is cool, I don't think anyone I know here would. I showed a friend the picture of what had been done, and he had no idea what it was or why a keyboard would be colored that way. He'd played both portals more than once. So I'd probably just stick to making cool color schemes personally.