dynamic styles

HTML

<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>
<div class="hexagon"></div>

CSS

.hexagon {
	position: relative;
	display: inline-block;
	width: 100px; 
	height: 57.74px;
	background-color: #F7CA18;
	margin: 28.87px 0;
	margin-right: 4px;
}

.hexagon:before,
.hexagon:after {
	content: "";
	position: absolute;
	width: 0;
	border-left: 50px solid transparent;
	border-right: 50px solid transparent;
}

.hexagon:before {
	bottom: 100%;
	border-bottom: 28.87px solid #F7CA18;
}

.hexagon:after {
	top: 100%;
	width: 0;
	border-top: 28.87px solid #F7CA18;
}

JavaScript

var randomColors = ["#96281B","#F7CA18","yellow", 'black', 'red', 'green', 'blue'];

function getHexagonClassName(color) {
    return 'hexagon-' + (color[0] === '#' ? color.substr(1) : color);
}

$.each(randomColors, function(_, color) {
    var className = getHexagonClassName(color);
    $('<style>.' +
      className + '{background-color:' + color + ';}.' +
      className + ':before{border-bottom-color:' + color + ';}.' +
      className + ':after{border-top-color:' + color + ';}</style>')
    .appendTo($('head'));
});

$(".hexagon").each(function(index) {
    var len = randomColors.length;
    var randomNum = Math.floor(Math.random()*len);
    var color = randomColors[randomNum];
    var className = getHexagonClassName(color);
    $(this).addClass(className);
});