Generate an ultra-realistic portrait of a black woman with vibrant, rainbow-colored mechanical hair and detailed steampunk elements. Her face is dark-skinned with smooth, matte texture and highly realistic facial features. She has colorful tribal-like face markings in bright shades of blue, pink, yellow, and orange, adding to her striking appearance. Her hair is a blend of vibrant colors, integrated with intricate metallic gears and mechanical elements that form an elaborate headpiece. She wears layered metallic necklaces and colorful sashes with rainbow patterns and shiny decorations, while her outfit is a combination of traditional and futuristic steampunk aesthetics, featuring gears, cogs, and mechanical parts on her shoulders. The lighting should emphasize the contrast between her dark skin and the vivid colors, making the mechanical elements stand out while maintaining an overall photorealistic look. The background should be dark to enhance the focus on her and the intricate details of her adornments.