Systematic Colour (Part 1) - An Introduction to Colour Theory

How do we perceive colour?

-Spectral colour is a colour that is evoked(awake) by a single wavelength of light within a visible spectrum.

-A single wavelength, or narrow band of wavelengths generates monochromatic(single) light.

-Every wavelength of light is perceived as a spectral colour in a continuous spectrum.

-The colours of similar or fully close wavelengths are often indistinguishable(weak) by the human eye.

The eye contains two kinds of receptors:
-RODS (classify black, white and grey)
-CONES (allow our brain to perceive colour). There are three types of Cones which are
TYPE 1:Sensitive to red-orange light
TYPE 2:Sensitive to green light
TYPE 3:Sensitive to blue-violet light.

When a single cones is being stimulated, the brain perceives the corresponding colour. For example:
-Green cones are stimulated > Green
-Red-orange cones are stimulated > Red
-Both our green and red-orange cones are simultaneously stimulated > Yellow
Due to this face, the eye can be "fooled" into seeing the full range of visible colors through the proportionate adjustment of (Red, Green and Blue)

Spectral Colour

-The eye cannot see the different between spectral yellow, and some combination of red and green.
-The same effect accounts for our perception of cyan, magenta, and the other in-between spectral colours.

Chromatic Value: Hue + Tone + Saturation