For bathroom lighting at night, red would be ideal. You can see but it won't really wake you up.

This is where smart lightbulbs - like the Hue - are great. The allow to tune the color temperature and the brightness according to the situation. In my bathroom at night, the light comes on only to 50% and at a much warmer tone. For my living room, I have a pure dark red setting, whenever I plan to do some stargazing.

I have migraines and I use Hue to control temperature. I find the cooler the light (blue, white) the easier it is on my headaches, where the warmer (yellow, orange) light makes me feel like I'm squinting, or in a daze and not fully awake. With Hue I can change just the area of the house I'm in to cool white and my wife can have her yellow warm glow everywhere else.

I use UV for my lighting because red/orange tends to be too bright for me. I do wonder if this has negative effects on my quality of sleep though.

I light my apartment with red or orange LED strips in the evenings. It's much easier on the eyes.