Share Email Facebook Twitter LinkedIn Select Color Dialog Box Defines the color of objects. COLOR (Command) Find You can select from the 255 AutoCAD Color Index (ACI) colors, true colors, and Color Book colors, available on three tabs. Related Concepts About Color BooksAbout Setting the Color of Objects Related Reference Index Color Tab (Select Color Dialog Box)True Color Tab (Select Color Dialog Box)Color Books Tab (Select Color Dialog Box)COLOR (Command)