.collection .element-item{
	width: 75px;
	height:75px;
	border: 1px solid #000;
	float:left;
	margin:2px;
}

.collection .element-item.red{
	background-color: red;
}

.collection .element-item.blue{
	background-color: blue;
}

.collection .element-item.green{
	background-color: green;
}