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Colour Wheel
        A colour wheel is a visual representation of colours arranged according to their chromatic
        relationships.


              Primary Colours                   Secondary Colours                     Tertiary Colourst
 Identification & Recognition
 Light from external objects enters our eye through the pupil. The human eye has a lens and
 iris diaphragm which works like a camera. The optics of the eye project an upside-down
 image of those objects on the rear, inner surface of the eyeball (the retina). There, a dense
 carpet of light-sensitive photoreceptors converts light (photons) into electro-chemical sig-
 nals, which are then processed by neural circuits in the retina and transmitted to the brain.  Any one of the primary
                                               Any of the two primary colours        colours and any one of the
 Primary Colours                                 can be mixed to produce          secondary colours can be mixed
                                                    secondary colours.
 Red, yellow and blue are primary colours. These are three pigment colours, which cannot   These are the primary colours.  to produce tertiary colours.
 be made by mixing any other colours, instead we can mix these colours to create all the
 other ones. They can also be combined with white or black to create tints (lighter tones) and   Complementary Colours  Analogous Colours  Tertiary Colourst
 shades (darker hues).










                                                 The group of colours have        Active colours are warm colours,
              The pair of colours that          similarities and have a close
 Colour Spaces and Theory  contrast with each other are    relationship with each other.  and passive colours are cool
              complementary colours.                                                         colours.
 Additive Colours
 An additive colour model involves light emitted directly from a source or   Colour Psychology
 illuminant of some sort. Combining one of the additive primary colours   Each colour has a profound effect on how we feel, both, mentally and physically. The
 with another in equal amounts produces the additive secondary colours   following are some emotional associations that humans tend to have with certain colours.
 cyan, magenta and yellow. Combining all three primary colours in equal
 intensities produces white.  Colour Name  Emotional Responses      Behavioural/ Physical Responses



           Black                 Mystery and loneliness             N/A
 Subtractive Colour  White       Purity and balance                 N/A
 A subtractive colour model explains the mixing of paints, dyes, inks
 and natural colourants to create a full range of colours. Each of which   Purple/Violet  Exotic and creative  N/A
 is caused by subtracting (i.e. absorbing) some wavelengths of light
 and reflecting the others.  Blue  Freshness                        Reduced pulse, body temperature and appetite

           Green                 Hope, peace and ecology            Mentally soothing, calms nerves

           Yellow                Optimism, spirituality and         Attention-grabbing, alarming
                                 Inspiration
 CMYK Colour Model
 This (also known as process colour model or four colour model) is a     Orange  Energy, happiness and liveliness  Perceived as glowing, also attention-grabbing
 subtractive colour model, used in colour printing. CMYK refers to the
 four inks used in colour printing: cyan, magenta, yellow and key black.  Red  Stimulant, enthusiastic and  Over-exposure causes agitation, raises the
                                                                    pulse, increased appetite
                                 passionate

           Brown                 Stability, reliability and         A feeling of wholesomeness, Offers a sense of
                                 approachability                    orderliness


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