body {background-color:white;} /* reference element */ 

.myPara {border-width:1px; color: white;} /* reference class */

#myHeading {font-family: verdana;} /* reference id */

#myHeading,.myPara {font-family: arial;} /* combination using comma */

.myList .myListItem {background-color: white !important;} /* chain together to refine selection, plus important (prevents overrides) */

.myList .myListItem {background-color: pink;} /* chain together to refine selection */

div {margin-left:100px;}