[@IceHeart] Nora is named after the [url=http://www.bbc.co.uk/staticarchive/d4f55b7e3933a1f71f966470de03357eae4cc7fb.jpg]Aquilegia Nora Barlow[/url] Or atleast, that's what people say.

The names should refer to something that has a distinct colour or is actually a colour (Most of the time in a different language) Unless you're Mercury Black. 

Their name can also be derived from another word that refers to the colour. So for example, Pyrrha was derived from Pyrrhos which is 'Flame coloured' in Greek.

Weiss Schnee is 'Snow White'.