He is using two different hoop colors.  He must maintain balance not only in design for the hoops but for each of the colors.

</font> <a href="http://www.rickwillis-photos.com/Portfolio/Best/Hidden-Photos-Without-Frames/26709550_DZD78d#!i=2451389384&k=5WCDMBr"> <font color="Red">Link to Photo Without Frame</a> </font>