User Guide

Chapter 5: Painting And Image Editing
To customize a color table by blending colors:
Canvas lets you create blends of selected swatches in the color table. When you do this, the first and
last swatches you select don’t affect the final blend in the color table. How the blend appears in the
color table is determined by the two colors you choose in the Color Picker in step 2 of this procedure.
1. Drag across multiple color swatches to select them (the more you select, the more gradual
the blend will be). Selected color swatches appear highlighted with a black border, and then
the color picker dialog box opens.
2. In the color picker, choose the first color, and then click OK. The color picker remains open;
choose the second color, and then click OK. Canvas fills the selected color swatches in the
Color Table dialog box with a ramp of the two colors.
RGB color image mode
RGB color mode is used most often when working with high-quality full-color images, such as those
from color scanners and digitized photographs stored on CD-ROM.
RGB color mode is the most reliable mode to use for images you want to modify with painting tools
and filters. However, the full range of RGB colors exceeds the range that commercial printing can
reproduce, so you should be aware of the limitations of the printing method that will be used. Also,
an RGB color image is device dependent, which means that the same RGB values can look different
when displayed on different monitors.
In RGB color mode, each pixel has a red, green, and blue component. Each component, referred to as
a color channel, has 256 intensity levels. The combination of the intensity value in each channel
creates each pixel’s color.
Remember that RGB is used for images on the Web and CMYK is used for print.
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