According to the theory of the art historian Marcia B. Hall, which has gained considerable acceptance, ''unione'' () is one of the canonical painting modes of the Renaissance; that is, one of four modes of painting colours available to Italian High Renaissance painters, along with

sfumato Sfumato (, ) is a painting technique for softening the transition between colours, mimicking an area beyond what the human eye is focusing on, or the out-of-focus plane. It is one of the canonical painting modes of the Renaissance. Leonardo da V ...

, chiaroscuro and cangiante. Unione was developed by Raphael, who exemplified it in the ''

Stanza della Segnatura The four Raphael Rooms ( it, Stanze di Raffaello) form a suite of reception rooms in the Apostolic Palace, now part of the Vatican Museums, in Vatican City. They are famous for their frescoes, painted by Raphael and his workshop. Together with Mi ...

''. Unione is similar to sfumato, but is more useful for the edges of chiaroscuro, where vibrant colors are involved. As with chiaroscuro, ''unione'' conveys the contrasts, and as sfumato it strives for harmony and unity, but also for coloristic richness. Unione is softer than chiaroscuro in the search for the right tonal key. There should be the harmony between light and dark, without the excesses and accentuation of a chiaroscuro mode.

References

Painting techniques {{art-technique-stub