<p class="msr_btn11">
  <a href="#">button01</a>
</p>

.msr_btn11 a{
  width: 230px;
  padding:15px;
  color:#ffffff;
  font-size: 15px;
  line-height: 120%;
  text-align: center;
  text-decoration: none;
  background: #1B73BA;
  border: 2px solid #1B73BA;
  -webkit-box-shadow:0px 0px 0px 1px #ffffff inset;
  -moz-box-shadow:0px 0px 0px 1px #ffffff inset;
  box-shadow:0px 0px 0px 1px #ffffff inset;
  display: block;
  position:relative;
  -webkit-transition: 0.3s ease-out;
  -moz-transition: 0.3s ease-out;
  -o-transition: 0.3s ease-out;
  transition: 0.3s ease-out;
}
.msr_btn11 a::before{
  content: '';
  width: 6px;
  height: 6px;
  border: 0px;
  margin:0 15px 1px 0;
  border-top: solid 2px #fff;
  border-right: solid 2px #fff;
  -ms-transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
  position:relative;
  display:inline-block;
  -webkit-transition: 0.3s ease-out;
  -moz-transition: 0.3s ease-out;
  -o-transition: 0.3s ease-out;
  transition: 0.3s ease-out;
}
.msr_btn11 a:hover{
  color:#1B73BA;
  background: #ffffff;
}
.msr_btn11 a:hover::before{
  border-top: solid 2px #1B73BA;
  border-right: solid 2px #1B73BA;
}