Accessorizing a light blue dress can elevate its elegance. Consider a delicate necklace with a shimmering pendant or a statement necklace with intricate details. Add a matching pair of earrings and a bracelet for a cohesive look. For a touch of whimsy, incorporate a floral headband or a scarf with intricate embroidery. Complete the ensemble with a classic pair of pumps or ankle-strap sandals in a neutral hue, such as white, beige, or metallics.