The confident Moxie Girl in the coloring page is Lexa. She has a determined expression and her arms are crossed in front of her. Her serious demeanor is complemented by the contrasting white and black coloring page. She is wearing a high-necked sleeveless shirt tucked into tight fitting pants. Her long, curly hair cascades down her back. To bring out her unique look, I would personally opt for a rainbow color palette. Start out with a light, pastel purple for her shirt, a lighter yellow for her pants, and a bright blue to give definition to her hair. For a touch of whimsy, I would add a bright pink to her cheeks and use a jade green to create a stunning contrast against the other colors. Finally, I would use vibrant oranges, lavenders, and yellows to color her background and add a touch of vibrancy. With this combination of hues, Lexa is sure to stand out in any coloring page.