.button {
background-color: #FFFFF; /* Green */
border-color: #ffffff;
color: #fff;
padding: 10px 10px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 8px;
margin: 2px 2px;
cursor: pointer;
}
.button4 {background-color: #ffffff; color: black;} /* Gray */