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

acute art background banner black blank 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 neon network origami pattern poly polygon polygonal rainbow rectangle shape sharp spectrum structure tessellated tessellating tessellation trend trendy triangle triangular varicolored variegated vector wallpaper