No.
I did the following:
1. The module was placed in the content area ( background white ) within an article ( lodmoduleid) and the border appeared.
2. The module was set to a module position (background white) and no border appeared.
3. The module was loaded again into the content area. No border appeared.
I think the problem is solved for me

Thank you

Thomas.

Hallo!

To change the background color, go to the corresponding module in the "General Settings" --> scroll down --> "Background Color"

Hallo ip mann,

thanks for your response, but this option changes the background color ot the text field. I want to change the background color of the entire modul .

Hallo!

Do you mean the background color of the position in the template where this module is inserted?

If yes, then via "System" --> "Site Template Styles" --> select your template --> "Modules/Component Styling" and here Background Color of the template position where your News module is placed.

The modul is inserted in an article like {loadmoduleid 117} at content position. With background color I mean this

Hello

Would you have URL to an example of your module?

Ciaran

here it is : http://test.iv-fotografie.berlin/index.php

But the background of the entire modul as shown in my post before is gone. I don't no why, but is is okay.

Hello

As your module is in the content area, does editing the General -> Modules/Component Styling -> Article Background Color option give you the desired result?

Ciaran