187
ADOBE ILLUSTRATOR CS2
User Guide
To change a color to its inverse or complement
1
Select the color you want to change.
2
In the Color palette, select an option from the palette menu:
Invert
Changes each component of a color to the opposite value on the color scale. For example, if an RGB color has
an R value of 100, the Invert command will change the R value to 155 (255 – 100 = 155).
Complement
Changes each component of a color to a new value based on the sum of the highest and lowest RGB
values in the selected color. Illustrator adds the lowest and highest RGB values of the current color, and then subtracts
the value of each component from that number to create new RGB values. For example, suppose you select a color
with an RGB value of 102 for red, 153 for green, and 51 for blue. Illustrator adds the high (153) and low (51) values,
to end up with a new value (204). Each of the RGB values in the existing color is subtracted from the new value to
create new complementary RGB values: 204 – 102 (the current red value) = 102 for the new red value, 204 – 153 (the
current green value) = 51 for the new green value, and 204 – 51 (the current blue value) = 153 for the new blue value.
To invert multiple colors
1
Select the objects whose colors you want to invert.
2
Choose Filter > Colors > Invert Colors.
You can use the Color palette to invert individual colors.
To shift an out-of-gamut color to a printable color
Some colors in the RGB and HSB color models, such as neon colors, cannot be printed, because they have no equiv
alents in the CMYK model. If you select an out-of-gamut color, an alert triangle
appears in the Color palette or
Color Picker.
❖
Click the triangle to shift to the closest CMYK equivalent (which is displayed below the triangle).
See also
“About color spaces and gamuts” on page 184
To shift a color to a web-safe color
Web-safe colors are the 216 colors used by all browsers, regardless of the platform. If you select a color that is not
web-safe, an alert cube
appears in the Color palette or Color Picker.
❖
Click the cube to shift to the closest web-safe color (which is displayed below the cube).
See also
“About web graphics” on page 442