<h1 class="cp_h1title">見出しテキスト</h1>

.cp_h1title {
	position: relative;
	padding-left: 35px;
}
.cp_h1title:before{
	position: absolute;
	content: "\002713";
	background: #1E88E5;
	color: #fff;
	font-size: .7em;
	top: 50%;
	left: 0;
	width: 1.5em;
	height: 1.5em;
	line-height: 1.5em;
	text-align: center;
	border-radius: 50%;
	transform: translateY(-50%);
}
.cp_h1title:after {
	content: '';
	display: block;
	position: absolute;
	top: 50%;
	left: 0.9em;
	height: 0;
	width: 0;
	border-style: solid;
	border-width: 6px 0 6px 10.4px;
	border-color: transparent transparent transparent #1E88E5;
	transform: translateY(-50%);
}