I'm curious as to why my table header changes color when there is no CSS and I haven't styled the table in my HTML

Hey there, I need some help with my page setup:

https://i.sstatic.net/EUsUC.png

The section labeled "Detailansicht Telefonnummer" has a mysterious blue background that's not coming from the empty CSS file or Angular component. Any insights on where it might be originating from would be greatly appreciated.

Here is the code snippet from phonenumber-detail.html:

<table>
    <tr>
      <th>ID</th>

    </tr>
    <tr>
       <td>{{id}}</td>

    </tr>

</table>

<br>
<button (click)="blockPhoneNumber((phonenumber))">Manually block</button>
<br>
<button (click)="unblockPhoneNumber((phonenumber))">Unblock</button>
<br>
<button (click)="reservePhoneNumber((phonenumber))">Reserve</button>

<table style='text-align:left'>
  <thead>
    <tr>
       <th colspan="2"><h3>Detailed View of Phone Number</h3></th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td width= '200'><b>Number:</b></td>
      <td></td>
    </tr>
    <tr>
      <td><b>Type:</b></td>
      <td></td>
    </tr>
    <tr>
      <td><b>Last Updated:</b></td>
      <td></td>
    </tr>
    <tr>
      <td><b>Updated by:</b></td>
      <td></td>
    </tr>
  </tbody>
</table>

<br />

<button (click)="goBack()" class="btn btn-primary" style="margin: 0 20px">back</button>
<button (click)="goBack()" class="btn btn-primary" style="margin: 0 20px">block</button>
<button (click)="goBack()" class="btn btn-primary" style="margin: 0 20px">reserve</button>

Answer №1

table th h3 {
  background: transparent !important;
}

table th h3.bg-default {
  background: transparent !important;
}
To fix the issue, consider implementing the following solutions:
solution 1-
<th colspan="2"><h3>Detailansicht Telefonnummer</h3></th>
<hr>
solution 2-
<th colspan="2"><h3 class="bg-default">Detailansicht Telefonnummer</h3></th>

Give this a try...

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