This is an example of color separation CMYK (Cyan, Magenta, Yellow, and Black). Together these colors when printed on top of each other (layered) can create a beautifully rich color image.
![](http://2.bp.blogspot.com/_3GVCQ0Tlikk/ScMd0vQSSEI/AAAAAAAAAYQ/jGDuUdiuTC4/s400/welcome+to+cal+CMYK+750.jpg)
Top Left: Cyan Top Right: Magenta
Bottom Left: Yellow Bottom Right: Black
Original image below