Above the recently created figure add one more with the old instrument. The color should be
E8E8EA.

One more figure that would have the color
999B9D, like in the next image.

Draw one more figure above the recently created one. The new one must have the color
DDDEDF.

Take a new instrument

to represent an ellipse of black color, like in the picture below.

One more figure with the previous instrument. The parameters are shown next step.
Blending Options-Gradient Overlay
Gradient’s parameters. 
Take the same instrument to represent a figure with the color
D8D8D8, like in the next picture.

Take the instrument

to draw an ellipse with the color
22A9CC above the black ellipse, like in the next picture.

Take the instrument

to represent a figure with the color
767879, like the next image.