Go to http://villavu.com/forum/misc.php?do=cybstats
Change results to view to 200
Change the top right list to Top reputations.
Name : Amount of times repped : reputation : rep power
I only know blue ones on your cp at the reputation received list. That is just a sign somebody with 0 rep power tried to rep you or somebody with less then 2 rep power tried to de-rep you.