abstract watercolor background with vibrant purple blue, violet hues. dreamy, surreal colors create magical, mysterious

abstract watercolor purple blue violet hue background dreamy surreal magical mysterious highcolored swirly bold mesmerizing marbled gradient splatter splash pastel hallucinogen artful dynamic dream vibrant textured nebulous bright rippled cosmic airy soft light blended aetherial ai generative illustration digital art image color palette design effect fantasy poster