<div>
  <button class="bootstrap-btn">Primary</button>
  
</div>

.bootstrap-btn {
	display: inline-block;
	font-weight: 400;
	color: #212529;
	text-align: center;
	border: 1px solid transparent;
	padding: .375rem .75rem;
	font-size: 1rem;
	line-height: 1.5;
	border-radius: .25rem;
	color: #fff;
	background-color: #007bff;
}


.bootstrap-btn:hover{
  	background-color: #0069d9;

}