For reasons unknown to me, Adobe does not allow you to save directly to a Swatches files from the color table dialog, but once the color table is opened in the Swatches palette you can save it back out again as a swatches file with an ACO extensione.
Note: You don't have to save the ACT file back out as an ACO file, but it is a good idea if you intend to share you swatch collections with other Photoshop or Photoshop Elements users.If you choose Save Swatches from the Swatches palette menu, you will get an ACO file which you can share with other users of Photoshop and Photoshop Elements.
After saving your swatches, you can reset swatch colors, replace, or load a new swatch collection from the palette menu.
