Here are the basic shapes and positions. Now we get to color them.
Select the two partial circular shapes shown above in dark gray. Switch
to the Fill Tool (F5) and from the drop down list of Fill Types on the
Infobar, select Circular. Drag the center of the fill up and to the left.
Double click on the fill path arrow to add a new color.
Click on any control point and then open then Color Editor (Ctrl e).
Select RGB Color Model and edit the selected color using the first RGB
color settings shown above. Repeat for the other two colors.
NOTE: If your color units are in % instead of 0-255, go to Utilities
> Options > Units and change your Color Units to 0-255. Click
Apply and then OK to close the dialog.
Select the modified rectangle for the base unit and apply a Linear fill
using the two colors shown on top.
Select the rectangular side of the base and apply a Flat fill.
TIP: To apply an interactive Linear fill, click on the the object
with the Fill Tool to select it, hold down the Ctrl key (to constrain
the angle) and drag, in this case, downward. You can also just free
drag in any direction you want by not holding down Ctrl.
Apply a Linear fill to the front face of the stand using the two colors
and the direction of the fill path as shown.
Select the Shape Editor Tool and add a 1px line just over the top side
of the rectangular side of the base. Edit the outline color as shown.
This creates an edge between the two parts of the base.