You can style blockquote with custom CSS. The default is:
blockquote {
background: rgba(128, 128, 128, 0.1);
border-width: 0;
border-left: 4px solid rgba(128, 128, 128, 0.4);
margin: 1.5em;
overflow: auto;
padding: 0 1.5em 1em 1.2em;
}
blockquote cite {
font-style: normal;
font-weight: bold;
}
blockquote p {
font-style: italic;
font-size: 1em;
}
cite, em, i {
font-style: italic;
}
cite { /* cite is supposed to be used only in a quote or blockquote */
border-width: 0;
display: block;
margin-left: 3em;
margin-top: .5em;
}