This coloring page is absolutely magnificent! The blue horse stands tall with its wings spread wide, its rainbow-colored mane and tail adding a whimsical element to the otherwise serene picture. To bring out the best of the horse's beautiful markings, you can use bright shades of yellow, orange, and pink for its mane and tail, while keeping the rest of its coat a light blue. To bring out its wings, consider adding a few light touches of dark blue and purple. Lastly, to make the horse look like it's grinning, consider adding a few touches of white. This coloring page is sure to bring a smile to any artist's face!