The Sugar interface defines a strict palette for the control widgets, along with guidelines for using these colors for various states and control types. Custom controls should adhere to the same set of colors and associated rules in order to ensure that their behavior mimics those of the core Sugar controls, and can be easily inferred by those who are familiar with them. Though their name and primary uses define these colors, any color within the palette provided below may be used for various parts of your control where it doesn't interfere with the basic rules associated with them.