Cooper and Rose are two mischievous trolls that can be spotted in their cave underneath the bridge. They have green skin, pointy noses and large ears, and they love to wear vibrant and colorful clothing. To color the trolls, you could use light green on their facial features, such as their noses and ears, then use a brighter green on their bodies. For their outfits, you could go with a range of tones – lighter rainbow shades for a playful look, or deeper, more muted hues for a more serious expression. Finally, you could add polka dots, stripes, or other patterns to make the trolls unique and fun.