Click the Background button. A Change Background Color dialog box will open. Select a color, then OK. Then click the Edit tab on the menu bar and select Fill with BG Color from the drop-down list.

GIMP 2.6 provides a "Color Picker Tool" that samples a small section of your image file. This color sample selected as a foreground or background color can then be copied to another part of the image.

Open your project in GIMP and select the Text Tool, which has an "A" icon, in the Toolbox. If your Toolbox isn't open, click "Tools" in the menu bar and then "New Toolbox." ...