Colbran's dramatic soprano voice and sizable three
octave range, along with her significant dramatic abilities, allowed her to have an extremely successful operatic career. She was described as a true
dramatic soprano capable of the most elaborate
coloratura. She mainly acted in grand, tragic roles, which never saw her doing comedic operas. The timbre of her voice was described at "sweet and mellow, with a rich middle register able conjure touching lyricism." She was said to have "the celestial art of singing to such a degree that signs of the liveliest admiration for and purest delight in her have been made clear and manifest in the places of the major monarchs of Europe". She had the advantage of a voice of exceptional compass and of striking dignity of movement and gesture. She sang at Accademia Polimniaca and
Accademia Filarmonica in Bologna in 1807 before moving on to
Teatro alla Scala in 1807. For nearly a decade Colbran was considered one of the best singers in Europe and had a large and loyal following, especially in Naples, and was loved by
King Charles VI. She was hired with a 7-year contract with the
Teatro di San Carlo and became the mistress of
impresario Domenico Barbaia, which lasted less than a year. Colbran had the great ability, beauty of tone, and the ability to sustain phrases of . She started working with composer
Gioachino Rossini, who would end up writing 18 operas just for her voice from 1815 to 1823, including
Otello,
Armida and
Maometto II. Rossini said that Colbran was the "greatest interpreter of his music". Critics described Colbran's talent as "a wealth of exquisitely observed detail [that] could be read into the statuesque calm of her every gesture". The vocal demands of the roles Rossini had created for her is inferred to be a cause to the rapid deterioration of her voice and vocal cords. By the age of 20, she had performed and wooed the crowds of all of Europe. She was described by
Stendhal as "a beauty of the most imposing sort; with large features that are superb on the stage, magnificent stature, blazing eyes, , a forest of the most beautiful jet-black hair, and, finally, an instinct for tragedy. As soon as she appeared [on stage] wearing a
diadem on her head, she commanded involuntary respect even from people who had just left her in the foyer." From 1806 to 1815, she was considered the most celebrated soprano in all of Europe. In 1823, her fee per opera was £1,500. Overall, she was considered the queen of Theatro di San Carlo, and just the queen of theatre, for a very long time. On 2 January 1823, the phrase "Pray for the Soul of Colbran Rossini" () was inscribed on the walls of Venice. This was because of the opera
Maometto IIs first performance in Venice on 26 December 1822, which had been met with much dissent from the audience, who had gone ill-disposed to the theatre. While Colbran's performance was praised, the opera was receiving criticisms and threats to the actors and actresses' lives if they chose to continue. The opera gave 25 performances in Italy, and eventually gave additional performances in France. The opera is considered one of Rossini's boldest and most politically motivated. ==Later years==