Begin by selecting Insert -> Illustrations (group) -> SmartArt.
Select the Pyramid category and then select the Inverted Pyramid from the list.
This yields the following:
Although we can add text to the SmartArt object, the object is not dynamic. To make this work with our data, add two more shapes to the hierarchy to match the number of categories in the data.
Select SmartArt Tools -> Design (tab) -> Create Graphic (group) -> Add Shape twice.
Now comes the twist;
We will convert the SmartArt graphic to a traditional shape object.
Right-click on the Inverted Pyramid and select Convert to Shapes.
With the converted shape object, select the top level in the pyramid and alter its fill color.
Repeat this process for each level, selecting a different color for each level.