.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 19px;
    margin: 4px 2px;
    cursor: pointer;
}

.button2 {
    background-color: #008CBA;
}
/* Blue */
.button3 {
    background-color: #f44336;
}
/* Red */
.button4 {
    background-color: #e7e7e7;
    color: black;
}
/* Gray */
.button5 {
    background-color: #555555;
}
/* Black */