.btn{
  font-family: arial;
  font-size:14px;
  font-weight:700;
  text-transform: uppercase;
  border:none;
  padding:10px;
  cursor: pointer;
  display:inline-block;
  text-decoration: none;
}
.btn-yellow{
  background:#cccc66;
  color:#fff;
  box-shadow:0 5px 0 #666633;
}
.btn-yellow:hover{
  background:#cccc66;
  box-shadow:0 5px 0 #666633;
}
.btn-yellow:active{
  position:relative;
  top:5px;
  box-shadow:none;
}

body {
  background-color: #011622;
}

//cccc99
666633
999966

666633