.main-col {
	padding-bottom: 15px;
}

.main-col .head {
	font-size: 200%;
	color: white;
	text-align: center;
	margin-right: -15px;
	margin-left: -15px;
	margin-bottom: 15px;
}

.main-col:nth-child(odd) .head {
	background: red;
}

.main-col:nth-child(even) .head {
	background: blue;
}