$('#canvas').mousemove(function(e) {
   var pos = findPos(this);
   var x = e.pageX - pos.x;
   var y = e.pageY - pos.y;
   var coord = "x=" + x + ", y=" + y;
   var c = this.getContext('2d');
   var p = c.getImageData(x, y, 1, 1).data;
   var hex = "#" + ("000000" + rgbToHex(p[0], p[1], p[2])).slice(-6);
   //do something with the color
});