abstract sand dunes with pastel pink, purple, and blue under a serene sky

landscape sand dunes abstract pastel colors gradient pink tones purple hues blue shades serene atmosphere tranquil setting dreamy horizon cloud fadeout effect smooth shapes blending harmoniously aigenerated clip art sky sinuous curves flow like desert warm sunset seamlessly deep red soft golden yellow wave-like patterns create soothing composition reminiscent wind-sculpted sandscapes ai-generated category: illustrations