Select the object you want to change.
On the Drawing toolbar, click Shadow Style , and then click Shadow Settings.
On the Shadow Settings toolbar, click the arrow next to Shadow Color .
Click the color you want.
If you don't see the color you want, click More Shadow Colors. Click a color on the Standard tab, or click the Custom tab to mix your own color, and then click OK.
Tip To change the shadow color so you can see through it, click Shadow Color , and then click Semitransparent Shadow.