oauth-blue-button.css

.oauth a {
  text-decoration: none;
  background: #239cbb;
  box-sizing: border-box;
  min-height: 35px;
  width: auto;
  display: inline-block;
  padding: 0.9em 1.37em;
  cursor: pointer;
  color: #fff !important;
  font-size: 12px;
  line-height: 13px;
  font-weight: 300;
  text-align: center;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-shadow: none;
  border-radius: 0.2em;
  border: rgba(0,0,0,0.05) 0.1em solid;
  -webkit-transition: background 0.3s ease, border-color 0.3s ease;
  -moz-transition: background 0.3s ease, border-color 0.3s ease;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.oauth a:hover {
  background: #01cf9e;
  color: #fff;
  text-decoration: none;
}