
The color circle :
There are many different color circles, but this color circle is the most used.
It's made by Johannes Itten.
It works like this ;
Blue & yellow make green.
Blue & red make violet (purple).
Yellow & red make orange.
If you have orange and you put a little yellow in you make yellow-orange.
But if you put a little red in the orange you get red-orange.
And that's also with violet (purple) and green.

Johannes Itten :
Johannes Itten was born on November the 11th in 1888 (Südern-Linden).
In 1916 he opened his own school in Vienna.
From 1919 to 1923 he taught at the "Bauhaus".
In 1923 he left the "Bauhaus", in the same year he opened another school in Berlin.
From 1932 to 1938 he taught at "Krefeld School of Textile Design".
In 1938 he settled down in Zurich, there he had 4 posts, - as director of the "School of Arts and Crafts", the "Museum of Arts and Crafts", the "Rietberg Museum", and the "School of Textile Design".
Itten also wrote several books about color theory.
He died on May the 25th in 1967 (Zurich).