The color
The objects do not have a color by themselves but they have the property to absorb or return the luminous rays.
One started to penetrate the world of the color thanks to Newton in 1666
He discovered that a sun ray crossing a prism of glass was refracted and declined itself in the colors of the rainbow.
In 1709, it identified the colors of the spectrum: red, orange, yellow, green, blue, indigo,violet.
By making them pass by a prism, they reconstitute the white.
A century later, they discovered:
- that the white could be produced only by the only mixture of three of the colours of the ghost:
red (orangy red), green, blue (purple blue).
- that these three colours combined them some with the others allowed all coloured feelings.
Colours, according to Runge and Itten, rank according to their three dimensions:
- tint (even colour)
- tonality (brightness)
- saturation (intensity of the colouring)
The work of the eye
Light penetrates into the eye and hits the retina. There it is absorbed by cells which they name sticks and cones. Cells transmit bright signs by optic nerve. Colour exists only in the cerebrum of the one who looks.
They say that the cerebrum and the eye are chromogènes what means that they produce colour.
Cones are sensitive to the nuances of red, green and blue and seem alone able of estimating sunlight in sieved illumination.
Sticks are more sensitive to the stocks of shades and light.
The human eye would be able of detecting more than ten million colours. but it also has these borders. The human eye does not appreciate very well the modulations of yellow, nor the degrees of purity of reds or purples
The perception of colours is instantaneous and outstrips that of forms even.
The bright waves
When a tube of painting (rose quinacridone for instance) is closed, indoors, the molecules of pigments are black. In the opening, the bright rays enter and immediately molecules absorb all expulsions except those of the pink quinacridone which are then reflected and immediately received by the eye. Colour is therefore a perceptible feeling by the eye and it reaches nerve centres under an encoded form. Every colour issues on a length of different wave. The length of the shortest wave is purple and the longest is the red.
To change your logo go to the 'Page Master' under the 'Design' menu
