9

Color Selector Dialog 163
To make a color d ar k er, do one of the f ollowing:
• Drag the vertical Whiteness slider (at the right
of the Hue rainbow) upward.
• Drag the vertical Black ness slider (at the left of
the Hue rainbow) downward.
• Drag the Saturation (Sat.) slider to the right.
• U se the Saturation spinner to increase
saturation.
• Drag the Value slider to the left.
• Use the Value spinner to decrease t he va lue.
To r eturn to the origina l color:
•ClickReset.
The new color is replaced by the original color,
and all parameter values are reset.
To dismiss the Color Selector, do one of the following:
•ClickOKorCancel.
• Click the dialog’s Close (X) button.
Inter face
Hue—Define a pure color by dragging the hue
poin ter across the top of the bo x.
Blackness—Drag the blackness pointer down the
side to darken the pure color by adding black. You
can also click or drag inside the box to change hue
and blackness at the same time.
Whiteness—Theverticalbartotherightcontrols
the a mount of whiteness. The color set by the hue
and blackness pointers is displayed at the top of
thebarandpurewhiteatthebottom.Dragthe
whiteness pointer down to lighten the color by
adding white.
Red, G reen, and B lu e—Whenared,green,orblue
slider is all the way to the left, its numeric field
contains 0; none of the color controlled by that
slider is used. If the slider is all the way to the right,
the field reads 255; the maximum amount of that
color is being used.
The spinners to the right of each slider are another
way of sett ing the red, blue, or green component.
The colors in the sliders change to show an
approx imation of what the color result will be
if you move the slider to that location, without
adjusting any other color parameter.
Hue—Sets the pure color. Locating the slider all
thewaytotheleftgivesyoupurered. Asyou
drag the slider to the rig ht you move through
the spectrum of Red, Yellow, Green, Cyan, Blue,
Magenta, and back to Red again. Hue is more
accurately represented as a color wheel rather than
a linear slider. That is why the Hue slider is red at
both ends. Thin k of the hue range from 0 to 255 as
being points on a circle w here the numbers 0 and
255 are right next to each other.
Saturation ("Sat")—Sets the purity or streng th of
the color. A weak color, with a saturation near 0,
is dull and gray. A strong color, with a saturation
near 255 is very bright and pure.
Value—Sets the lightness or darkness of a color.
Low va lues darken the color toward black. High
val ues lighten the color toward white. A value in
the m iddle, at a setting of 127, gives you the color
definedonlybyhueandsaturation.
Co lor Output —This pair of color swatches, below
the Value slider, lets you compare the new color,
shownontheright,totheoriginalcolor,shown
on the left.