Overlapping table element left and right border

Question

I want to set each element in the first row of my table to have a left border of a certain color and a right border of a certain color. Unfortunately, it looks like the borders of adjacent table cells are overlapping and I only get the left border color showing. The left border is supposed to be light gray and the right side dark gray.

Here is my HTML generating the table. (HTML is generated in cherrypy)

<th id="tbl_head" colspan='4'>%s</th>
    <tr>
        <td id="colhead">Track</td>
        <td id="colhead">Artist</td>
        <td id="colhead_time">Time</td>
        <td id="colhead">Album</td>
    </tr>

Here is my CSS:

table {
    font-family: verdana,arial,sans-serif;
    font-size:11px;
    margin-left: auto;
    margin-right: auto;
    border-width: 1px;
    border-collapse: collapse;
}

td {
    padding: 3px;
}

#colhead {
    font-weight: bold;
    text-align: left;
    background-color: #989898;
    color: #000000;

    border-left-color:   #aeaeae;
    border-left-style: solid;
    border-left-width: 2px;

    border-right-color: #6c6c6c;    
    border-right-style: solid;
    border-right-width: 1px;

}

#colhead_time {
    font-weight: bold;
    text-align: right;
    background-color: #989898;
    color: #000000;

    border-left-color:   #aeaeae;
    border-left-style: solid;
    border-left-width: 2px;

    border-right-color: #6c6c6c;    
    border-right-style: solid;
    border-right-width: 1px;

}

Answer 1

Use the below properties on your table CSS.

border-collapse: separate;
border-spacing: 0px;

table {
  font-family: verdana, arial, sans-serif;
  font-size: 11px;
  margin-left: auto;
  margin-right: auto;
  border-width: 1px;
  border-collapse: separate;
  border-spacing: 0px;
}
td {
  padding: 3px;
}
#colhead {
  font-weight: bold;
  text-align: left;
  background-color: #989898;
  color: #000000;
  border-left-color: red;
  border-left-style: solid;
  border-left-width: 2px;
  border-right-color: blue;
  border-right-style: solid;
  border-right-width: 1px;
}
#colhead_time {
  font-weight: bold;
  text-align: right;
  background-color: #989898;
  color: #000000;
  border-left-color: red;
  border-left-style: solid;
  border-left-width: 2px;
  border-right-color: blue;
  border-right-style: solid;
  border-right-width: 1px;
}

<table>
  <th id="tbl_head" colspan='4'>%s</th>
  <tr>
    <td id="colhead">Track</td>
    <td id="colhead">Artist</td>
    <td id="colhead_time">Time</td>
    <td id="colhead">Album</td>
  </tr>
</table>

Fiddle Demo

Answer 2

It's your use of border-collapse: collapse; use border-spacing:0;border-collapse:no-collapse; instead.

Answer 3

In your css, you have added the wrong value for border-color property. You write it as:

border-right-color: 1px solid #6c6c6c; 

while it should be:

border-right-color: #6c6c6c;