irregular polygon background - triangle low poly pattern - full spectrum multi color rainbow

acute art background banner blank bright color colored colorful colour crystal cubism design diamond empty fraction fractional fragment full geometric geometrical geometry gradient grid illustration irregular low lowpoly mesh modern mosaic multi multicolor multicolored network origami pattern poly polygon polygonal rainbow rectangle shape sharp spectrum structure tessellated tessellating tessellation trend trendy triangle triangular varicolored variegated vector vibrant vivid wallpaper