Change border color of multiple cells in Excel 2010?

Yeah, just multiselect the cells and click the borders button o the Main Tab. On the menu, select Line color and have at it.

edit

Forgot about the obvious answer. Format Painter.

I got the answer, found it myself, On the menu, select Line color, then you'll see a pencil, click on a cell then press ctrl and drag the pencil trough the desired cells. Check it by yourself !