Color plays one of the biggest roles in graphic design.
It can give emphasis, it can be used as a mechanism of organization, it can create impact and create a specific look and feel in a piece of graphic design work.
Color Theory provides us with practical guidance to help us mix colors and create color schemes.
Color works differently for screens and for print projects.
The color mode or image mode determines how colors combine based on the number of channels in a color model.
Different color modes result in different levels of color detail and file size.