The dialog box for New color and Edit color is used for setting the color definitions:

CMYK process color, RGB color, Custom color, or Tone.

CMYK process colors, RGB colors and custom colors are generated using the same process on the basis of the CMYK color model. Which preference you select here depends on how the documents with your drawing are to be used. For conventional color printing processes, you should use CMYK process colors or custom colors as required. If you only want a printout on a color printer, this setting is unimportant. If the documents are primarily for online publication, it is best to create the colors using the RGB method. (See About Colors in Arbortext IsoDraw.)

Create the required color mix for the CMYK color components; C (cyan), M (magenta), Y (yellow), and K (black), or, the RGB color components; R (red), G (green), and B (blue) using the sliders or the entry fields.

Tones are employed to produce graduated versions of colors which have already been defined.