I have caught some really big greens that had some amazing color. So I am sure it is just kinda luck of the draw. I have caught some 8-9" that had better color than some of mine.
I have two. This is my largest one I guess he's close or at 7". My smaller more colorful one is in with my CA/SA. I just dumped most of my pics to disk so this is all I have (until wife shows me how to get the rest back). I'll try to get some shots of my smaller one tonight.