To specify the color palette of a document, which of the following should be done?

A) Create custom theme colors.
B) Create custom theme fonts.
C) Create custom theme effects.
D) Create a custom style.

To specify the color palette of a document, creating custom theme colors is the best choice. It allows for a consistent color scheme throughout the document, and makes it easy to apply colors to various elements such as text, shapes, and charts. Creating custom theme fonts, effects, or styles do not directly relate to specifying the color palette.