Within this window you can create and load new colors into custom libraries.
+ Icon: Click the + Icon open the Add Custom Color Window.
Pencil Icon: Click a color swatch to select it then click the Pencil Icon to open the Edit Color Window.
Trash Can Icon: Click a color swatch, or command/control click multiple colors, then click the Trash Can Icon to delete the Color(s) from the Library.
Upload Icon: Click the Upload Icon to Upload Colors.
Cancel: Closes the window without saving changes.
Save: Saves changes and closes the window.