Column combinator

/* || 결합자 주위의 공백은 선택이자 권장 사항입니다. */
column-selector || cell-selector {
  /* style properties */
}

<table border="1">
  <colgroup>
    <col span="2" />
    <col class="selected" />
  </colgroup>
  <tbody>
    <tr>
      <td>A</td>
      <td>B</td>
      <td>C</td>
    </tr>

    <tr>
      <td colspan="2">D</td>
      <td>E</td>
    </tr>
    <tr>
      <td>F</td>
      <td colspan="2">G</td>
    </tr>
  </tbody>
</table>

col.selected||td {
  background: gray;
  color: white;
  font-weight: bold;
}