blockquote {
    padding: 1em;
}

blockquote.info {
    border-left: 4px solid gray;
    background-color: #f9f9f9;
}

blockquote.blue {
    border-left: 4px solid #00f;
    background-color: #e6f7ff;
}

blockquote.warning {
    border-left: 4px solid orange;
    background-color: #fff7e6;
}

blockquote.danger {
    border-left: 4px solid red;
    background-color: #ffe6e6;
}

blockquote.success {
    border-left: 4px solid green;
    background-color: #e6ffe6;
}