This design uses primary colors to deliver its purpose. When I saw this design, I was immediately drawn to its color scheme. I think primary colors make up one of the most powerful color schemes, thus making them a huge tool for me as a designer.
this pin is a depiction of the design element of COLOR. The picture shows matching real life objects to their color number on the pantone scale. Which is a way of identifying different shades of color on the RBG scale.