soft shading watercolor background with rainbowcore aesthetic: featuring various colors blended with light aquamarine and pink

soft shading watercolor background rainbowcore aesthetic various colors blended light aquamarine pink tones embellished delicate washes for dreamy colorful appea vibrant hues pastel rainbowinspired palette artistic expression whimsical charm dreamlike atmosphere backdrop composition ethereal beauty gradients tranquil ambiance playful vibe flair pastels soothing subtle texture design creativity appeal imaginative artwork aesthetic: featuring pink perfect designs