A caricature of german TV personality and satirist Jan Böhmermann.
The hanging, droplet-shaped nose is a stylistic element which was also used in animated characters like Squidward or some of the characters in the animated series Gravity Falls. I always thought it would fit a caricature of Jan Böhmermann well, too.
I chose a less cartoony style for the shading, though.
This might be interesting for you as well:
On of the roles of the composition of an image is to depict the most important elements of the picture in a clear, recognizable manner. For color pictures, not only the placement of the elements is playing a central role, but the color composition as well.
An obvious method is to separate diffrent elements or layers within the image like foreground and background by different color saturations of a difference in lightness.
There are many approaches for setting up a color composition. To acquire some helpful rules of thumb, it can be useful to look at some of the oldest works of visual design in history: Coat of arms and flags.