To duplicate or delete a color, select Window > Swatches, click the color to duplicate or delete, and select Duplicate Swatch or Delete Swatch from the panel menu. When duplicating a swatch, the paint bucket appears. Click in the empty area of the Swatches panel with the paint bucket to make a duplicate of the selected color.
To clear all colors from the color palette, in the Swatches panel, select Clear Colors from the panel menu. All colors except black and white are removed from the palette.