body { margin: 0 0 0 0; background-color:#ffcc00; }

div.colour1 { margin: 0 0 0 0; float:left; width:15px; line-height:15px; background-color:#000000; }
div.colour2 { margin: 0 0 0 0; float:left; width:15px; line-height:15px; background-color:#ffcc00; }