git-imerge/imerge.css

table#imerge {
    border-collapse: collapse;
    font-family: monospace;
    border: 1px solid black;
}

table#imerge td {
    padding: 15px 5px;
    background: #f44;
    border: 1px dashed #444;
    text-align: center;
}

table#imerge td.frontier_within {
    background: #4f4;
}

table#imerge td.frontier_right_edge {
    border-right: 5px solid black;
}

table#imerge td.frontier_bottom_edge {
    border-bottom: 5px solid black;
}

table#imerge td.merge_manual {
    background: #4f4;
    font-weight: bold;
}

table#imerge td.merge_unknown:before {
    content: "?"
}

table#imerge td.merge_unknown {
    color: #555;
}

table#imerge td.merge_blocked:before {
    content: "BLOCKER"
}

table#imerge td.merge_blocked {
    background: #c00;
    border: 1px solid #400;
    font-weight: bold;
}