<div class="quadro">
<a class="btn btn-success">08:00</a>
<a class="btn btn-success">09:00</a>
<a class="btn btn-success">10:00</a>
<a class="btn btn-success">11:00</a>


</div>


.quadro .btn-success{
	width:60px;
	color:white;
}

.quadro .btn-danger{
	width:60px;
	color:white;
}

.quadro .btn-success:hover{
	
	color:#dedede;
}

.quadro .btn-danger:hover{
	
	color:#dedede;
}