Fun and easy to use palette changer, thanks for making it. If possible I'd like to request a few features to the Palette Builder:

1. Revert a single palette color back to its base color
2. Copy a single palette color (hue, saturation, value) and paste it as a value to another
3. Option to always display the base sprite in the preview panel

Good suggestions. If I ever get around to building the next version, these will be in there!