When Mr. Paul Klee made "Red Earth" in 1926, he used variations of blue and red. While blue is exemplifies a cool and primary color, red is a warm color according to the theory of Color Temperature. Red is primary hue, too, just like blue. Pink is a tint, or light variation, of red.
"So Danish" is a three-dimensional art form that was was featured in Denmark's National Gallery of Architecture. This Scientific Art Form also features shapes, which are two-dimensional objects. In particular, there are rectangles and squares in this visual art form. There are additionally neutral colors, which include black/white; gray and brown.