3D paper cut light box illustration framework

If no specific color scheme is given, automatically choose a main palette and gradient that fit the theme, while keeping a soft, night-light-friendly look. For example, warm gold to cool blue-green for forest themes, teal to deep blue for underwater themes, icy blue to deep blue for winter scenes, amber to electric blue for cyber cities, candlelight gold to deep indigo for castles, or deep blue to purple with golden glows for space themes.