The default border color for a text box is light gray. To change the border color, click on the border of the text box. The Drawing Tools: Format menu will appear on the right of the menu ribbon. Select the Drawing Tools: Format menu. Directly under the "Format" menu tab, select the drop-down menu for "Shape Outline". Select the desired weight and color for the border. We recommend using a 3/4 point solid black border.
www.thinkreliability.com