View file bootstrap-colorpalette-master/css/bootstrap-colorpalette.css

.bootstrap-colorpalette {
    padding-left:4px;
    padding-right:4px;
    white-space: normal;
    line-height:1;
}

.bootstrap-colorpalette div {
    line-height:0;
}

.bootstrap-colorpalette .btn-color {
    width: 17px;
    height: 17px;
    border: 1px solid #fff;
    margin: 0;
    padding: 0;
}

.bootstrap-colorpalette .btn-color:hover {
    border: 1px solid #000;
}