rhodecode/public/js/mode/tiki/tiki.css

.cm-tw-syntaxerror {
    color: #FFF;
    background-color: #900;
}

.cm-tw-deleted {
    text-decoration: line-through;
}

.cm-tw-header5 {
    font-weight: bold;
}
.cm-tw-listitem:first-child { /*Added first child to fix duplicate padding when highlighting*/
    padding-left: 10px;
}

.cm-tw-box {
    border-top-width: 0px ! important;
    border-style: solid;
    border-width: 1px;
    border-color: inherit;
}

.cm-tw-underline {
    text-decoration: underline;
}