rainbow gradient. multicolor background. abstract color watercolor. iridescent texture. background with metallic effect for

abstract backdrop background backgrounds blue bright color colored colorful colors colour colours design effect foil gloss gradient illustration iridescent material metal metalic metalize metallic mottled multi multicolor multicolored neon ombre paint paper patern paternity paterns pattern patterned patternes patterns plate print purple rainbow red sample samples speckle surface swatch swatches texture textured ultra vector vibrant wallpaper watercolor