Gradient solid yuzu nail design style refers to a nail art trend that features a solid, single-color yuzu design with a gradient effect. This style typically involves blending different shades of yuzu, a citrus fruit, to create a smooth and visually appealing transition on the nails. The technique can range from a subtle, pastel gradient to a bold, neon gradient. It is popular for its unique and vibrant look, and can be customized to suit various personal tastes and occasions.