• If the image is a drawn picture (vector-based (vector graphics: The representation of graphic objects such as lines, arcs, and squares by using geometrical formulas. By contrast, bitmapped graphics (also called raster graphics) are stored as a collection of pixels.)), select the picture and then click Recolor Picture on the Picture toolbar.
• If the picture is clip art (clip art: A single piece of ready-made art, often appearing as a bitmap or a combination of drawn shapes.), try ungrouping the image, and then use the drawing tools to change the colors.

The image is a bitmap (bitmap: A picture made from a series of small dots, much like a piece of graph paper with certain squares filled in to form shapes and lines. When stored as files, bitmaps usually have the extension .bmp.), which can't be ungrouped and converted to an object (drawing object: Any graphic you draw or insert, which can be changed and enhanced. Drawing objects include AutoShapes, curves, lines, and WordArt.).

You can modify the image in an imaging program, and then insert it into your work.