How we perceive colour:
Spectral colour: doesn't have a physical forms, it exists around us
single wavelength or narrow band of wavelength generates monochromatic colour
every wavelength of light is perceived as a spectral colour in continue colour
colour of similar or close wavelengths.
White Light:
cant see individual wavelengths, see as a mix of white light
interpret colour when white light is reflected of a surface.
different materials create different wavelengths
Shorter wavelengths produce blue light, why the sky is blue.
Everything to do with colour is based on how we see it.
Rods: conveys shade of black, white and grey
Cones: colours
Type 1: sensitive to red-orange light
Type 2: sensitive to green light
Type 3: sensitive to blue-violet light
When different cones are stimulated we will see different colours such as if our green cons are stimulated we will see green.
The eye if folded due to the physiological response which allows the eye to see a full range of colours through the adjustments of red, green and blue.
Spectral Colour
The eye can't differentiate between spectral yellow and combinations of red and green
the same effect accounts for our perception of cyan, magenta. Different colour modes are needed to be able to understand colour which relate to physical colour and spectral colour to do with light. Additive colour is based on the principles of white light RGB meaning if you mix red, green and blue together you’ll get white light and subtractive colour relates to physical mixture of colour CMYK, meaning they subtract colour/remove colour the more they are overlapped meaning if all are mixed you’ll create black. Subtractive colours have both screen and print colour modes.
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