Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
/*coloured save page button*/
INPUT#wpSave {
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
    border: 2px solid #000;
    padding:0 3px 0 3px;
    display:inline-block;
    text-decoration:none;
    color:#FFF;
    background:#FFF;
    background-color:#000;
    cursor:pointer;
}
INPUT#wpSave:hover {
    cursor:pointer;
    border:2px solid #669;
}
/*coloured preview button*/
INPUT#wpPreview {
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
    border: 3px solid #000;
    padding:0 3px 0 3px;
    display:inline-block;
    text-decoration:none;
    color:#FFF;
    background:#FFF;
    background-color:#000;
    cursor:pointer;
}
INPUT#wpPreview:hover {
    cursor:pointer;
    border:2px solid #669;
}