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Value
Value
refers to the relative lightness or darkness of a
certain area. Value can be used for emphasis.
Variations in value are used to create a focal
point for the design of a picture. A light figure
on a dark background will be immediately recognized
as the center of attention, similarly for a dark
figure on a mostly white
background. Gradations of value are also used
to create the illusion of depth. Areas of light and
dark can give a three-dimensional impression, such
as when shading areas of a person's face.

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Drawing
by Marguerite Smith, Saskatoon
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Color
Color
occurs when light in different wavelengths strikes our eyes.
Objects have no color of their own, only the ability to
reflect a certain wavelength of light back to our eyes. As
you know, color can vary in differing circumstances. For
example, grass can appear gray in the morning or evening or
bright green at noon. Colors appear different depending on
whether you view them under incandescent, florescent or
natural sunlight. Colors also change according to their
surroundings. You can see this by looking at the color
squares below - the reddish outline box is the same color in
all the examples.

Properties
of Color
Hue
Hue
refers to the color itself. Each different hue is a
different reflected wavelength of light. White light
broken in a prism has seven hues: red, orange, yellow,
green, blue, indigo and violet. White light occurs when
all the wavelengths are reflected back to your eye, and
black light occurs when no light is reflected to your
eye. This is the physics of light.

When
it comes to using color in art, things get quite messy.
Looking at the color wheel above, when using color
pigments, the three primary colors used are yellow, blue
and red. These three colors are blended together to
produce other colors, called secondary colors, such as
green, orange and purple. Mix enough colors together, and
you get black. Pretty strange, eh?
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Computer
Colors
Computer
colors are produced by combining the three
colors of red, green and blue together. Believe
it or not, you can get yellow by combining these
colors (I've never been able to figure out why,
but you can!)
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Printer
Colors
Things
get even dicier on computers when you go to
print out these colors. Printing uses the CYMK
convention which takes cyan (light blue),
yellow, magenta (pinky red) and black inks and
tries to recreate the color that your computer
created with red, green and blue
light.
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Color
Value
Color
value refers to the lightness or darkness of the hue.
Adding white to a hue produces a high-value color, often
called a tint. Adding black to a hue produces a low-value
color, often called a shade.
Intensity
Intensity,
also called chroma or saturation, refers to the
brightness of a color. A color is at full intensity when
not mixed with black or white - a pure hue. You can
change the intensity of a color, making it duller or more
neutral by adding gray to the color. You can also change
the intensity of a color by adding its complement (this
is the color found directly opposite on the traditional
color wheel). When changing colors this way, the color
produced is called a tone.
When
you mix complementary colors together, you produce a dull
tone. However, when you put complementary colors side by
side, you increase their intensity. This effect is called
simultaneous contrast - each color simultaneously
intensifies the visual brightness of the other
color.
Below
are some examples of how this works, using a program
called Metacreations painter. As you can see, you choose
a hue from the outer ring. Inside the triangle, you can
vary the saturation of the hue (amount of color), the
tint or the shade.
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Above: choosing a pure
color of blue (hue) by moving the cursor all the
way to the right.
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Above: choosing a less
saturated color of blue (tone) by moving the
cursor toward the center of the
triangle.
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Above: adding white
(tint) to the color by moving the cursor to the
top part of the triangle
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Above: adding black
(shade) to the color by moving the cursor toward
the bottom part of the triangle
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Optical
Color Mixing
When
small dots of color are placed adjacent to each other, your
eye will combine the colors into a blended color. This is
the principle used when printing color in magazines. Dots of
cyan, magenta, yellow and black are distributed in a pattern
on the paper, and depending on the quantity of a certain
dot, you will see a specific color on the page. Paul Signac
used a technique called pointillism that involved creating
art using the combination of dots to form images.
View
Port St. Tropez.
Color
and Space
Certain
colors have an advancing or receding quality, based on how
our eye has to adjust to see them. Warm colors such as red,
orange or yellow seem to come forward while cool colors such
as blue and green seem to recede slightly. In the
atmosphere, distant objects appear bluish and the further
away an object appears, the less colorful and distinct it
becomes. Artists use this to give an illusion of depth, by
using more neutral and grayish colors in the
background.
Color
Schemes
Monochromatic
This
color scheme involves the use of only one hue. The hue
can vary in value, and black or white may be added to
create various shades or tints.
Analogous
This
color scheme involves the use of colors that are located
adjacent on the color wheel. The hues may vary in
value. The color scheme for this site is analogous,
with the colors varying only slightly from each
other.
Complementary
This
color scheme involves the use of colors that are located
opposite on the color wheel such as red and green, yellow
and purple, or orange and blue. Complementary colors
produce a very exciting, dynamic
pattern.
Triadic
This
color scheme involves the use of colors that are equally
spaced on the color wheel. The primary colors of yellow,
red and green could be used together in a color scheme to
produce a lively result.
Check
out Color Picker web software. This application will
allow you to choose a color and then display its
complementary or triadic match. Hint: read the
instructions first, then click on the link which says
"Open Color Picker 2". Color
Picker 2.
Color
Discord
While
monochromatic, analogous, complementary or triadic color
schemes are considered to be harmonious, there are some
color schemes considered dissonant. Discordant colors are
visually disturbing - we say they clash. Colors that are
widely separated on the color wheel (but not complementary
or triadic) are considered to be discordant. Discordant
colors can be eye-catching and are often used for
attention-getting devices in advertising.
Some
sources for information about color:
The
Munsell System of Color Notation
Ian
Kelly's Home Page about color
Color
Theory Page

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