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COLOR THEORY Final Report (4311 words)

Maaz Amin 109004

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CONTENTS

Science behind colours ......................................................................................................... 3

References ................................................................................................................................. 5

Bibliography ................................................................................. Error! Bookmark not defined.

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SCIENCE BEHIND COLOURS

Introduction

Scientifically, color is a theoretical thing, not a practical thing.

Practically/Realistically these are the light waves of different wavelengths

that the human eye can distinguish (Stone, 2006). Color is a visual sensation

depending on three related: light, an object, and an observer (Verity, 1980).

Color cant be touched, tasted, smelled or heard. The various rays that can be

distinguished by our eyes are altogether called as visible spectrum. This

comprises of ROYGBIV i.e. red, orange, yellow, green, blue, indigo and violet.

There are light waves or colors that some animals and insects can sense but

the humans cannot, these colors are ultraviolet and infrared that lie beyond

the range of visible spectrum. Infrared is present beside red and ultraviolet is

present beside violet. The visible spectrum along with infrared and ultraviolet

waves is known as white light. White light actually separates into an

uninterrupted gradation of colors. Wrapping these colors around a circle

creates a hue circle or color wheel. There is no clear separation between the

colors in the continuous spectrum created by a prism. Sir Isaac Newton

wrapped the spectrum around a circle by joining two ends of the visible

spectrum, red and violet. He saw the hues smoothly grading into each other

but in his diagram he identified only the seven colors known as ROYGBIV

Artists traditionally concentrate on six basic colors and drop indigo.

Human Perception of Colours

So in addition to the visible spectrum, human eye also detects white

(which includes all the colors of the spectrum) and black. Black

represents the absence of color i.e. no visible light reaches the eye. On

the other hand, if there is presence of white light but an object appears

black, this means that the surface of the object is absorbing almost all

the light and reflecting so little that the eye perceives it as black (Stone,

2006). The absorption or bouncing of light by a surface or object

depends upon its molecular structure or atomic bonding. For example,

graphite is black whereas diamond is clear/transparent even though

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both are made from carbon. This is because of the difference of

molecular structure. Different structures absorb light differently.

Diamond like glass allows light to travel through it (Cat, 2009). Red

green and blue are considered as primary colors because all other

colors are generated from a mixture of these colors. The human eye

also has three types of color receptor cells or cones that are red, green

and blue. All of the incoming light is converted to these three colors

and then mixed back. From the spectrum of white light, the

combination of red, blue and green creates a great amount of colors

but humans can only distinguish among approximately 10 million

colors, this visible spectrum is called as human color space (Stone,

2006).

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REFERENCES

Stone, T. (2006). Color Design Workbook: A Real World Guide to Using Color

in Graphic Design. USA: Rockport Publishers, Inc.

Verity, E. (1980). Color observed. USA: Van Nostrand Reinhold.

Cat, C. (2009). Why Diamonds are white and Graphite is black but both are Carbon. Retrieved from http://commercecat.hubpages.com/hub/Why-Diamonds-are-white-and-Graphite-is-black