Theory
Signals
Of all the colors, yellow gives the strongest signal. Red must be brightened to approach the light reflection of pure yellow. Blue must be brightened even more to reach the pure yellow brightness.
Words to describe colors
To describe a color tone is frequently used words such as hue and value. In general, they describe the content of a color in color, white and black. Words such as brightness, grayness, muted and broken is also used to describe a color tone.
Forsius Color circle
The arrangement of the color spectrum in a circle is generally attributed to Newton, but already in writings from 1611 by the Swede Forsius one encounters the colors arranged in a circle, that is almost 100 years before Newton did.
Raindrops
Raindrops act as small prisms that breaks the daylight and together produce a rainbow.
Isaac Newton
In the 17th century, Isaac Newton analyzed the composition of light. In a dark room, he sent a thin beam of daylight through a glass prism. The prism broke the daylight in a range of colors from red to violet, the so-called color spectrum. The order of the colors remained constant – red, orange, yellow, green, blue and violet. Newton operated with a seventh color between blue and violet, which is called indigo, a warm dark blue color. Today, it is common to operate only with the six colors, also called spectral colors.