How can I change basic forms default color?

I’m using LibreOffice 4.4.1. Is it possible to change the basic forms default color (fill color)? I just tried to change the Area color in the Default Style, but that just changes the page background color, not the fill color of the basic forms.

What exactly do you mean with “fill color”?

I mean the inside color within any given basic form in a diagram.

In Draw, can choose Format - Styles - Edit Style…; it will work for the new shapes added, but only for the actual document. Don’t find an equivalent for Writer.