background: {{ color1 }};/* Old browsers */ background: -webkit-linear-gradient(left, {{ color1 }}, {{ color2 }}, {{ color3 }});/* Chrome 10-25, Safari 5.1-6 */ background: linear-gradient(to right, {{ color1 }}, {{ color2 }}, {{ color3 }});/* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */