The composition represents an apparently contradictory quality and color, since the color enunciated in the title of the work does not have lightness as an essential component of its chromatic nature. In the course of this work, very light arpeggios are traversed where the melody of the upper voice appears fragmented while the performer completes the rest of the notes harmonically associated with this melody. This fragmentation, far from cutting the singing line, gives this melody a special way of being. In contrast to these passages where lightness and fluidity are essential characteristics, others appear where double, triple and even quadruple strings are present, giving the work a more leaden aspect.