Betta is Ginn's best friend. She is a natural dyer. She is depicted gathering materials and dyeing yarn for the community. I felt a combination of natural tones was what fit her best.
I also admit that Betta is my favorite character or at least the one I identify with the most. Of course it probably helps that she is a dyer like me!
You can find her yarn and those of the other characters from Beautiful Wreck here: http://www.lavendersheep.com/shop/bwreck.html