You can use the Fill Color tool to add a fill to any picture except an animated GIF (animated GIF: A file that contains a series of Graphics Interchange Format (GIF) images that are displayed in rapid sequence by some Web browsers to produce an animated effect.) picture. Make these changes in an animated GIF editing program, and then insert the picture file again.
Add or change a fill color
Do one of the following:
Add or change a gradient, patterned, textured, or picture fill
Remove a fill
Note You can also set the fill to match the background. On the Format menu, click Colors and Lines. Under Fill, click the Color box, and then click Background.