How do I remove border color from the widget?

How do I remove border color from the widget?

To remove border color first get into the edit mode and click on the pencil icon. Next click on the style tab and choose the border icon. Then choose which edges to enable (blue) and disable (gray) by clicking on them.

Here is how to remove border color from the widget:

Step 1: Get into the border menu
Step 2: Click on the blue edge icons to disable them.