Recondita Armonia is the first romanza in the opera Tosca, by Giacomo Puccini. It is sung by the painter, Mario Cavaradossi, when comparing his love, Tosca, to a lady he was painting.
Translation in English
Pass me the colors...
Concealed harmony of contrasting beauties!
Floria, my ardent lover, is dark haired.
And you, unknown beauty, crowned with blond hair,
You have blue eyes,
Tosca has black eyes!
Art, in its mysterious way,
blends the contrasting beauties together...
But while I'm painting her,
My only thought,
My only thought is of you,
Tosca, it is of you!