.button {
  background-color: #4CAF50; /* Green */
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}/* CSS Document */
.button2 {background-color: #008CBA;} /* Blue */
.button3 {background-color: #003399;} /* Red */ 
.button4 {background-color: #330000;} /* Gray */ 
.button5 {background-color: #555555;} /* Black */