abstract 4k background with intersecting triangles and a grainy texture, blending shades of pink, purple, lavender, and earthy

background grainy wallpaper blur banner backdrop pink purple lavender brown gradient abstract template geometric stripes lines shapes triangles vectors rays texture highresolution digital art modern creative design artistic smooth blend color transition vibrant minimalistic contemporary aesthetic soft tones seamless trendy elegant intersecting blending shades earthy ideal wallpapers banners designs