a vibrant and enchanting digital painting artwork: a detailed and harmonious rainbow stretching across a serene landscape, inspired by the colorful and whimsical art of Lisa Frank, Peter Max, Yayoi Kusama, Takashi Murakami, and Claude Monet's "Water Lilies" series. The artwork features a vibrant color palette, soft blending, an ethereal glow, and a joyous ambiance, with a captivating lighting and a magical aura.