Design a captivating 4K vibrant abstract background that primarily features a gradient blend of electric blue, neon pink, and sunshine yellow, creating an energetic visual experience. Incorporate swirling shapes and soft geometric patterns throughout the composition to add depth and complexity, ensuring these elements flow dynamically to guide the viewer’s eye across the piece. Emphasize a harmonious arrangement where the colors interact seamlessly, creating a sense of movement and rhythm. Utilize advanced digital techniques to enhance the luminosity of the colors, ensuring they stand out vividly against a subtly textured backdrop that adds richness without overwhelming the primary colors. The overall composition should evoke a lively and engaging atmosphere, effectively showcasing the interplay of bold colors and shapes in a modern digital illustration style.