It's difficult to tell without seeing more of your cat. I'll give you some basic information which will hopefully let you determine the answer. First, many cats appear to have three colors, but are not true calicos.
A true calico must have one of its colors derived from the red gene -- either red (orange) or a light, orangy beige like a deep ginger. If it does not have one of these two colors, it is not a true calico. The second color must be white, and the third color must be black, blue (a blue-gray), chocolate, lilac (a pale rose-beige), cinnamon, or fawn (a pale buff color). Black and blue are by far the most common.
Second, almost all calico cats are female due to genetics. When a calico is a male, it is considered to be due to a "genetic misfire". Only 1 in 3000 calico cats is male. A male tricolor cat is a genetic misfire. Cats sex chromosomes are similar to ours in that females have an XX and males have an XY In the case of male calicos, genetically, instead of being XY, he is XXY. Like us animals are meant to have chromosomes in pairs, and having three chromosomes where he is supposed to have two can cause health problems. It also almost always causes sterility. It is possible that your cat is not a true genetic calico, but merely has unusual markings that make him resemble one. This also goes for other tricolors including tortoiseshell and torbies. Check here for pictures of true calicos http://cats.lovetoknow.com/Slideshow:Ca … t_Pictures
