<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
table {
border-collapse: collapse;
border: 1px solid #DCDCDC;
font: normal 12px/1.5em Arial, Verdana, Lucida, Helvetica, sans-serif;
}
caption {
text-align: center;
line-height: 46px;
font-size: 20px;
color: blue;
}
td, th {
width: 40px;
height: 40px;
text-align: center;
border: 1px solid #DCDCDC;
}
th {
color: #000000;
background-color: #EEEEEE;
}
td.current {
font-weight: bold;
color: #FFFFFF;
background-color: blue;
}
td.last_month, td.next_month {
color: #DFDFDF;
}
tr>td, tr>td+td+td+td+td+td+td {
color: #B3222B;
background-color: #F8F8F8;
}
tr>td+td {
color: #333333;
background-color: #FFFFFF;
}
col.day_off {
color: #B3222B;
background-color: #F8F8F8;
}
</style>
</head>
<body>
<table>
<caption>
2017年7月1日
</caption>
<colgroup span="7">
<col span="1" class="day_off">
<col span="5">
<col span="1" class="day_off">
</colgroup>
<thead>
<tr>
<th>日</th>
<th>一</th>
<th>二</th>
<th>三</th>
<th>四</th>
<th>五</th>
<th>六</th>
</tr>
</thead>
<tbody>
<tr>
<td class="last_month">29</td>
<td class="last_month">30</td>
<td class="current">1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5</td>
</tr>
<tr>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>10</td>
<td>11</td>
<td>12</td>
</tr>
<tr>
<td>13</td>
<td>14</td>
<td>15</td>
<td>16</td>
<td>17</td>
<td>18</td>
<td>19</td>
</tr>
<tr>
<td>20</td>
<td>21</td>
<td>22</td>
<td>23</td>
<td>24</td>
<td>25</td>
<td>26</td>
</tr>
<tr>
<td>27</td>
<td>28</td>
<td>29</td>
<td>30</td>
<td>31</td>
<td class="next_month">1</td>
<td class="next_month">2</td>
</tr>
<tr>
<td class="next_month">3</td>
<td class="next_month">4</td>
<td class="next_month">5</td>
<td class="next_month">6</td>
<td class="next_month">7</td>
<td class="next_month">8</td>
<td class="next_month">9</td>
</tr>
</tbody>
</table>
</body>
</html>