You wish to change your design right?
Well, sometimes as a consequence your design results in a black background, with black text on top of it.

Oops! Because this breaks the EULA from Jelsoft:
So here's a fix 
First, go to the phrase in the admincp > languages > search in phrases > search for powered_by_vbulletin, and edit it. In the English box, in front of the existing text add
and at the end of the existing text, add
. It should now look like in the screenshot:

Next, go to the main css and add the class. Follow the path: admincp > styles & templates > style manager > dropdown: Main CSS > browse all the way down, and in the additional css box add:
. Of course, you can change the color naming, or use #hex value to match your design. It should look like in the screenshot:

Now load your site again, and it should look like in the screenshot:
Well, sometimes as a consequence your design results in a black background, with black text on top of it.
Oops! Because this breaks the EULA from Jelsoft:
All Software copyright notices within design templates must remain unchanged (and visible).

First, go to the phrase in the admincp > languages > search in phrases > search for powered_by_vbulletin, and edit it. In the English box, in front of the existing text add
Code:
<span class="copyright">
Code:
</span>
Next, go to the main css and add the class. Follow the path: admincp > styles & templates > style manager > dropdown: Main CSS > browse all the way down, and in the additional css box add:
Code:
.copyright { color: white }
Now load your site again, and it should look like in the screenshot: