colは横 rowは縦 <colgroup> <col span="1" style="width:50px; background-color:#ccccff;"> <col span="1" style="width:100px; background-color:#ffcccc;"> <col span="2" style="width:150px; background-color:#ccffcc;"> </colgroup> <colgroup span="1" style="width:50px; background-color:#ccccff;"> </colgroup>