div.editor_atto_content td,
div.editor_atto_content th,
div.editor_atto_content caption {
    border: 1px dashed #bbb;
    position: relative;
    min-width: 2rem;
    height: 2rem;
}

div.editor_atto_content caption {
    height: auto;
}

div.availablecolors {
    background-color: #eee;
    padding: 0.5rem;
}
div.availablecolors .tablebordercolor,
div.availablecolors .tablebackgroundcolor {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 2rem;
    height: 2rem;
    text-align: center;
    vertical-align: sub;
    border-radius: 25%;
    margin-right: 0.2rem;
}