NewsPen/themes/sepia/extra.css

.tile h1,h2,h3,h4,h5,h6 {
    color: var(--text);
}

.tile blockquote {
    background-color: var(--light2);
    border-left: 3px solid var(--secondary);
    padding: 5px 10px;
    display: inline-block;
}

mark {
    background: #f8edba
}

.tile pre {
    background-color: var(--light2);
    border: 1px solid var(--secondary);
    border-left: 3px solid var(--secondary);
    padding: 5px 10px;
    display: inline-block;
}