I suppose all if not most color names could be considered adjectives.
I've heard some people use words likes
Precious, Brave, True,
Noble as first names. I've seen
Jolie and
Belle used mainly in English-speaking countries, but they are adjectives in French, meaning pretty and beautiful respectively. Oh and
Clément in French literally means, to be merciful. We can say ''il est clément'', which means ''he is merciful''.
And
Ernest sounds like the word ''earnest''.
Don't hesitate to rate my different PNLs:
http://www.behindthename.com/pnl/246179