The princess has a gentle, serene expression on her face, illuminated by the soft blue hues of her dress, crown, and scepter. Her blue hair is styled in a billowing array of curls that slip down her back and cascade around her shoulders. To emphasize the princess's delicate, elegant features, I suggest you make use of light, pastel colors when coloring. Leave the blues untouched, taking advantage of her natural color palette, while bringing out the details in her clothing, hair, and accessories with soft pink, yellow, and lavender shades. This would create a delightful contrast between the deep blues and the pastel detailing, for a truly magical look.