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

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 striped structure tessellated tessellating tessellation theory trend trendy triangle triangular varicolored variegated vector vertical vibrant vivid wallpaper