Runge's Color Sphere
Like Johann Wolfgang von Goethe the German painter Philipp Otto Runge dealt with abstract questions concerning colors as well. Runge developed his own three-dimensional model of the color space known as the Farbkugel, the Color Sphere.
As shown in the picture, Runge arranged the three primary colors (I) red, yellow and blue around the equator of a sphere. Between two of these colors, he placed the respective combination color (II) orange, green, and violet. Towards both poles of the sphere, Runge added the respective shadings towards black and white.
You can turn the sphere when dragging the mouse with the primary mouse button pressed. The zoom factor can be changed by dragging it with the secondary button pressed.
Your runtime environment must support version 1.5 or later to view this applet!