I was kinda stupid when I regenned Wisteria and changed two of her colors, so Silverraven sent me a lesser dye in exchange for me nurturing enough pets to get 1,000 scales and exchanging those scales for a Philter of Nullification for one of her project. I used the dye on Wisteria after sending the Philter of Nullification over to Silver and chose a random color hex and color slot, then I confirmed and I was able to get Wisteria eligible to have her colors set back to the Delphinium Pink Punch theme palette, and so I pressed the button, followed by yes, and viola, her color palette was set back to what it originally was!