[quote=@DX3214]
NOW Brigan... It's the same thing as Belareth but due to the half i belive its more of a union between 2 families
[/quote]

You forget however that House Brigan is actually a bandit clan pretending* to be a great house. And bandits, being bandits, are not very knowledgeable in the meanings of crests. The colors actually have more to do with the words of House Brigan than the origins of it.

*I use the term loosely in this instance, as they are not as much pretending to be as they are declaring themselves to be and killing anyone who disagrees.