This tranquil lagoon is the home to a beautiful blue-haired mermaid. She has bright blue eyes, light blue skin, and a luxurious blue two-piece bikini. Her tail is the same beautiful hue and is almost blending with the surrounding waters. Nearby, a blue and white fish lazily swims past. To bring the page to life, you could use various shades of blue to achieve a vibrant, lively effect. For example, you could use a navy blue shade on the mermaid's hair, while using light, powder blues for her skin and tail. Then, use light blues on the fish and even lighter blues on the waves that ripple in the background. You could also add small hints of white, or even a light yellow to really make the lagoon stand out and make the mermaid look extra luminescent.