In the picker window, adjust the color, gradient, or curve to your liking.
In Swatches, click the outlined box.
If the view is in List mode, optionally type a name for the swatch.
Drag and drop swatches to change their order. Right-click a swatch to move it to the top, replace it, rename it, or delete it. You can also delete a swatch by Alt/Option-clicking it.
Use the drop-down menu in Swatches to:
Choose List or Grid to change the view. The List view also displays the names of swatches.
Choose a swatch library.
Choose Create a Library to create a new swatch library and the location to save it in.
Choose Reveal Current Library Location to view the current library in Windows Explorer/Mac OS Finder.
By default, Unity saves swatch libraries in your user preferences. You can also save a swatch library in your Project. Unity saves Project swatch libraries in the Editor folder of the Assets folder. To share Project swatch libraries between users, or to include them in a package, add them to a revision control repository.