In The Stones of Florence, Mary McCarthy describes Florence in shades of brown, gray and black. Not so in this fall’s Teatro del Maggio Musicale Fiorentino’s updated production of Mozart’s early opera, La Finta Giardinieria. Jesús Ruiz, Spanish scene designer and costumer, has created a backdrop of Florence with color-saturated buildings in classical form, complete with columns, cornices, capitals, pilasters, and arches. Ruiz’s Florence is alive with attention-grabbing hues— primary colors red, blue and yellow, with some secondary tones thrown in for good measure. The juxtaposition of blue sky with an emerald green column next to a red-orange building immediately and beautifully assaults the senses.