Apple iWork '08 - Manual (Page 78)

78 Chapter 2 Getting Started with Numbers
To change the background color of a cell:
1 Select cell F7, the bottom-right cell in your table.
2 In the Format Bar, click the Fill button.
3 In the palette that appears, click a color.
You can also add color to a cell, and to alternating rows, using the Table Inspector.
Add a background
color to this cell.
Choose the kind of fill for a cell:
None, Color Fill, Gradient Fill,
Image Fill, or Tinted Image Fill.
Select this checkbox and click the
adjacent color well to apply a
different color to every other row.