However, we can make some educated guesses based on their personalities and the show's style:
* SpongeBob's favorite color is yellow, so it might be a part of the wedding. Perhaps yellow accents on the flowers, decorations, or even the wedding cake!
* Sandy is from Texas, so maybe there's a Western/cowboy theme. This could involve brown, blue, and maybe some red accents.
* The show is full of bright colors, so it could be a very colorful affair. They could go for a rainbow theme, or just use a lot of different vibrant shades to make it fun and festive.
Ultimately, the wedding color scheme is up to you to decide!