Sure, changing the face color of a command button in Excel 2003 is possible. Here are the steps to do it:

1. First, make sure that the "Forms" toolbar is visible. If it's not, go to "View" "Toolbars" "Forms" to enable it.
2. Insert a command button onto your worksheet by clicking on the "Command Button" icon in the "Forms" toolbar.
3. Right-click on the button and select "Format Control" from the context menu.
4. In the "Format Control" dialog box, go to the "Colors" tab.
5. Under "Fill", select the color that you want to use for the button face.
6. Click "OK" to close the dialog box.

That's it! Your command button should now have a new face color. If you want to change it again, simply repeat the steps above.

Note that this method only changes the face color of the button. If you want to change other properties of the button, such as the font color or size, you'll need to use . Let me know if you need help with that.