How do I get the background colors to stretch into the bleed area. I keep getting a white border and I can't get rid of it

I am trying to design a brochure in libreoffice draw and I keep getting the white border around the edge. How do I get rid of this so the background stretches to the edge of the document?

Set the margins of the page to 0. Ignore the warning. Because you are in Draw, you has to position the objects manually anyway. You can take care of the non-printable areas of your printer yourself. There are several ways to get objects aligned. Do you need help on that?

Alternatively create a rectangle of the required size and colour and place it in the background.

Do you mean the page that you are drawing? You can colour the total page background using the option. TOOLS > OPTIONS > APPEARANCE, then select the colour on DOCUMENT BACKGROUND, the first option at the top of the list. You will find a host of other colour options to choose. You may also need to change the margin settings on the page layout itself. Does the printer allow you to print right to the edge of the paper? Peter