Imagine a city, bathed in the colors of a vibrant sunset, and not just any city, a futuristic cyberpunk one. This piece will embody a blend of organic essence and the inorganic realities of a technologically advanced society. Begin by mapping the cityscape; towering skyscrapers, neon signs, a play of light and shadow. Focus on detailing, infuse the architecture with tech-inspired elements. Now, work on the vibrant sunset. Start with a blend of red, pink and orange. Let the colors flow, reflect them off the buildings. Add depth by introducing purples and blues as you go higher. Remember, a real sunset is a melody of colors not just a plain gradient. Let your color pencils bring this melody to life in your cyberpunk city. Finally, softly blend the colors to form a realistic sky. The last step is light-play. Capture how the setting sun reflects, refracts and shimmers off the glass buildings, gives birth to long shadows, and yet parts of the city plunge into imminent darkness. Your city now lives, thriving under a vibrant sunset, embodying the paradox that is a cyberpunk utopia.