The colors on the fan are comprised of Even-Numbered Colors and Odd-Numbered Colors.  All of the Evens go with the Evens; all the Odds go with the Odds.  (You never want to mix Odd colors with Even colors.)  There are 32 colors on each fan, and 4 of every color. (Red, Green, Blue, Yellow, Purple, Orange, Grey, and Brown).

Let's say that you have a yellow sofa in your living room, and you want to add other compatible colors to your room decor. 

Simply hold up the 4 yellows in your Even-Numbered fan and the 4 yellows in your Odd-Numbered fan vertically against your yellow sofa.  Determine which yellow most closely matches your yellow sofa.  Let's say it matches Yellow #27.  That means that your living room is an ODD-NUMBERED ROOM.  (Another room could be an Even-numbered room.)  So, when you're shopping the only thing you need to bring for paint colors, accent pillows, drapery, upholstery, rugs, artwork, etc. is your Odd-Numbered fan.  Because as long as the most predominate color looks good with one of the 4 of any color in your Odd-Numbered fan, then you can be assured that it will look great with your #27 Yellow.  

And, that way you won't make an EXPENSIVE color-matching mistake!