FINAL ASSIGMENT

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COLOUR HARMONIES

ASSIGMENT

Task 1

Light through a prism mixes a little differently than solid paint. Because digital colors are mixed with light, there are different systems used. The printing industry also uses a different color system called CMYK. There will be more on this later.

To keep things simple for now, this page focuses on paint mixtures only. In other words what happens when one tangible hue is physically mixed with another.

WHAT IS ( CMYK )??

PRINTING COLOUR

C=CYAN

M=MAGANTA

Y=YELLOW

K=BLACK

 

 CMYK is a scheme for combining primary pigments. The C stands for cyan (aqua), M stands for magenta (pink), Y for yellow, and K for Key. The key color in today's printing world is black but it has not always been. During the early days of printing, the colors used for Key have been brown, blue, or black -- whichever was the cheapest ink to acquire at any given time.

The CMYK pigment model works like an "upside-down"version of the RGB (red, green, and blue) color model. Many paint and draw programs can make use of either the RGB or the CMYK model. The RGB scheme is used mainly for computer displays, while the CMYK model is used for printed color illustrations (hard copy).

There is a fundamental difference between color and pigment. Color represents energy radiated by a luminous object such as a cathode ray tube (CRT) or a light-emitting diode (LED). The primary colors are red (R), green (G), and blue(B). When you see a red area on a CRT, it looks red because it radiates a large amount of light in the red portion of the electromagnetic radiation spectrum (around 750 nanometers), and much less at other wavelength. Pigments, as opposed to colors, represent energy that is not absorbed by a substance such as ink or paint. The primary pigments are cyan (C), magenta (M), and yellow (Y). Sometimes black (K) is also considered a primary pigment, although black can be obtained by combining pure cyan, magenta, and yellow in equal and large amounts. When you see yellow ink on a page, it looks yellow because it absorbs most energy at all visible wavelengths except in the yellow portion of the spectrum (around 600 nanometers), where most of the energy is reflected.

The primary pigments and the primary colors are mathematically related.Any two pure radiant primary colors (R, G, or B), when combined,produce radiation having the appearance of one of the pure non-black primary pigments (C, M, or Y). Any two pure non-black primary pigments, when mixed, produce a substance having the appearance of one of the pure primary colors. These relationships are depicted in the illustration.

The primary colors RGB, combined at 100-percent brilliance,produce white. The primary pigments CMY, combined at maximum concentration,produce black. Shades of gray result from the equal (but not maximum) brilliance of R,G, and B, or from equal (but not maximum) concentrations of C, M, and Y. If you have a paint or draw program such as Corel DRAW! that employs both the RGB and the CMYK schemes, you can investigate these relationships by filling in regions with solid colors using one mode, and examining the equivalent in the other mode. After a while you will develop an intuitive sense of how these schemes work, how they resemble each other, and how they differ.

In general, the RGB mode should be used when preparing graphics intended mainly for viewing on computer displays. The CMYK mode should be used when creating illustrations for print media.


Copy From:http://whatis.techtarget.com/definition/CMYK-cyan-magenta-yellow-key

Primary Colors

In theory, the Primary Colors are the root of every other hue imaginable. The primary pigments used in the manufacture of paint come from the pure source element of that Hue. There are no other pigments blended in to alter the formula.
Think of the three Primaries as the Parents in the family of colors.
In paint pigments, pure Yellow, pure Red, and pure Blue are the only hues that can't be created by mixing any other colors together. Printer inks and digital primaries are referred to as Yellow, Magenta and Cyan.

Secondary Colors

When you combine any two of the Pure Primary Hues, you get three new mixtures called Secondary Colors.
Think of the three Secondaries as the Children in the family of colors.

SUMMARY  

YELLOW	+	BLUE	=	GREEN
BLUE	+	RED	=	PURPLE OR VOILET
RED	+	YELLOW	=	ORANGE

Tertiary Colors

When you mix a Primary and its nearest Secondary on the Basic Color Wheel you create six new mixtures called Tertiary colors.
Think of the six Tertiary Colors as the Grandchildren in the family of colors, since their genetic makeup combines a Primary and Secondary color.

Yellow + Orange = YELLOW-ORANGE
Red + Orange = RED-ORANGE
Red + Violet = RED-VIOLET
Blue + Violet = BLUE-VIOLET
Blue + Green = BLUE-GREEN
Yellow + Green = YELLOW-GREEN