Yes you should be able to. Just modify the style, change the font color from automatic to black.

In the styles pane, click on the style and select Modify. Then click on the font color drop down. By default it should be set to "Automatic". Click on the black color I'm pointing to. If you look REALLY CLOSELY you'll see an almost imperceptible red box
around that black color to show it is selected.
If you want to make this change apply to all new documents, you have to select the option "New documents based on this template" check box at the bottom of the modify dialog.