The Color Picker dialog contains the Web Palette tab, Named Colors tab, System Colors tab, and Custom Color tab. From these tabs, you can pick different colors.
Web Palette. You can choose a color from common web colors.
Named Colors. You can choose a color from common named colors.
System Colors. You can choose a color based on the colors of Developer Workbench.
Custom Color. You can drag red, green, and blue sliders to create custom colors.
The hexadecimal value for any color you select or create is displayed at the bottom of the dialog box. If you want to enter a specific hexadecimal value, you must enter using the Properties panel or the Style Composer dialog box, in the appropriate area. For example, you can enter a hexadecimal value on the Background-color property line.