This illustration is one of the artworks for the playing cards of a board game which is being designed by a game designer I’m friends with.
The game takes place at the beginning of the 20th century and centers around the upper crust of that era. The players can place bets on the results of horse races and with a little luck, increase their wealth that way.
Despite the artwork depicting the horse races, it’s designed to show the action from the perspective of the gentleman in the foreground, since the players also take on the role of the audience as opposed to the jockeys.
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.