IPython/frontend/html/notebook/static/css/renderedhtml.css

.rendered_html {color: black;}
.rendered_html em {font-style: italic;}
.rendered_html strong {font-weight: bold;}
.rendered_html u {text-decoration: underline;}
.rendered_html :link { text-decoration: underline }
.rendered_html :visited { text-decoration: underline }
.rendered_html h1 {font-size: 197%; margin: .65em 0; font-weight: bold;}
.rendered_html h2 {font-size: 153.9%; margin: .75em 0; font-weight: bold;}
.rendered_html h3 {font-size: 123.1%; margin: .85em 0; font-weight: bold;}
.rendered_html h4 {font-size: 100% margin: 0.95em 0; font-weight: bold;}
.rendered_html h5 {font-size: 85%; margin: 1.5em 0; font-weight: bold;}
.rendered_html h6 {font-size: 77%; margin: 1.65em 0; font-weight: bold;}
.rendered_html ul {list-style:disc; margin: 1em 2em;}
.rendered_html ul ul {list-style:square; margin: 0em 2em;}
.rendered_html ul ul ul {list-style:circle; margin-left: 0em 2em;}
.rendered_html ol {list-style:upper-roman; margin: 1em 2em;}
.rendered_html ol ol {list-style:upper-alpha; margin: 0em 2em;}
.rendered_html ol ol ol {list-style:decimal; margin: 0em 2em;}
.rendered_html ol ol ol ol {list-style:lower-alpha; margin: 0em 2em;}
.rendered_html ol ol ol ol ol {list-style:lower-roman; margin: 0em 2em;}

.rendered_html hr {
    color: black;
    background-color: black;
}

.rendered_html pre {
    margin: 1em 2em;
}

.rendered_html blockquote {
    margin: 1em 2em;
}

.rendered_html table {
    border: 1px solid black;
    border-collapse: collapse;
    margin: 1em 2em;
}

.rendered_html td {
    border: 1px solid black;
    text-align: left;
    vertical-align: middle;
    padding: 4px;
}

.rendered_html th {
    border: 1px solid black;
    text-align: left;
    vertical-align: middle;
    padding: 4px;
    font-weight: bold;
}

.rendered_html tr {
    border: 1px solid black;
}    

.rendered_html p + p {
    margin-top: 1em;
}