This is one of the great things of FM skinning, everybody can have his FM looking as they want it. For example, I don't like a lot using blue, green stands more for me about being something good/correct (maybe from the traffic lights). So mine is more about dark red/light orange/light green and using a brilliant green for excellent. I like also having a darker background that doesn't distract me, edited the default with photoshop to have an almost black one.
Here are my settings:
low attribute" red="140" green="45" blue="60"
normal attribute" red="190" green="170" blue="60"
good attribute" red="110" green="230" blue="110"
excellent attribute" red="0" green="255" blue="0"
and a screen shoot: