/* 枠線表示 */
table, tr, th, td {
  border: solid 0px;
  padding-right:  15px; 
  padding-left: 15px; 
}
/* 枠線間の余白を無くす */
table {
  border: 2px;
  text-align: center;
}

<!--
.red {background-color:#ff0000; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.blue {background-color:#0000ff; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.purple {background-color:#990099; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.green {background-color:#008000; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.black {background-color:#000000; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.navy {background-color:#000080; color:#ffffff; padding-left: 15px; padding-right:  15px; }
.gray {background-color:#708090; color:#ffffff; padding-left: 15px; padding-right:  15px; }

-->