colour is defined as the visual perceptual property that in humans are categorized as yellow, red, green, blue and many more. colour develops from the interaction of the spectrum of light, which is the distribution of wavelength versus the light energy, on your eyes with the spectral sensitivity of the light receptor.
The physical specifications and categories of colour are associated with materials, objects, light sources and many more. They are based on different physical properties such as reflection, emission spectra and light absorption. A colour may be identified numerically by its coordinate in a colour space.
You perceive colour because of the varied sensitivity of the different cone cells in your retina to various parts of the colour spectrum. A colour may be quantified and defined by the degree in which it stimuli into the cone cells.
Chromatics is how the science of colour is called. The process involves how your brain and eyes perceive colour, the colour origin in materials, the visible range of the physics of electromagnetic radiation and the artТs colour theory.
The characteristics of electromagnetic radiation are:
- Frequency or wavelength Ц which is also known as visible light when it is within the humansТ visible spectrum.
- Intensity Ц the perception of in spectral colour can be altered considerable such as yellow-green to olive-green and orange-yellow to brown.
Many light sources are emitting light at various wavelengths. The spectrum of the source is a distribution which gives its intensity in each wavelength. Usually, the colour sensation is determined by the spectrum of light that reaches your eyes from a certain direction. It is interesting to note though that there are more spectral combinations compared with colour sensations. In fact, you can define colour as a spectral that evolved to similar colour sensation.
The colours of rainbow in the colour spectrum include all colours that a visible light can produce from a single wavelength. This is the monochromatic colours or pure spectral colours. A continuous spectrum is formed by pure spectral colours. History and culture play a big role on how this spectrum is divided into various distinct colours. The main six bands of colours are:
Indigo is added as the seventh colour in the spectrum but many colour scientists refused to recognize it as a different colour from blue and violet.