Question about item colors after scrolling

Hey guys! First off I'd like to say that I wasn't sure if this would go in the Newbie section of the forums or the general section, so I put this thread here. Now, a simple question; How many stats *WA, AP, Auxillary* does an item have to be above avg. to change colors from blue to purple? =] I ask this because last night I bought a 69 attack Steelno *Lv. 80 Knuckle* and so far, I have 2 60%'s on it. The stats are 73/2 with 5 slots. I was just wondering how many more stats I need for it to be purple!

If it matters, it was 3 above when I bought it! I like rabbits