Princess Tiana looks poised and elegant in her beautiful green dress with its gold trim and purple sash. Her hair is pulled into a smooth bun, finished with a golden tiara for the perfect touch of regal grace. On her shoulder sits a little purple frog prince, a delightful companion. I would color the dress in a deep, luxurious green and add a shimmer of gold along the trim. The sash should be a vivid purple to offset the bright green of the dress. The tiara would best be colored in yellow-gold while the frog prince should be a light, sparkling purple. Finally, I would add a gentle pink to the princess' skin to complete the picture.