"Blue boy"... no, not that one....

Portrait of Jacques Bizet as a Child, by Jules-Élie Delaunay, 1878.

Louis-Antoine de Bourbon, duc d'Angoulême, by Joseph Boze, 1785.

Portrait of a Boy, by Kuzma Petrov-Vodkin, 1913.

Portrait of a Boy Wearing a Blue Bow Tie, American School, second half of the nineteenth century.

Young Peasant in Blue/Jockey, by Georges Seurat, 1882.

Grand Duke Alexander Pavlovich, later Tsar Alexander I, at the age of fifteen, by Jean-Louis Voille, 1792.

Die Baba (The Baby), by Marlene Dumas, 1985.

Boy in a Turban holding a Nosegay, by Michiel Sweerts, circa 1661.

The Boy in Blue, by Isaac Grünewald, 1919.

Portrait of a Young Boy Dressed in a Brown Coat with a Blue Waistcoat, by Nathaniel Hone, third quarter of the eighteenth century.

Portrait of an Indian boy, by Rudolf Swoboda, last quarter of the nineteenth century.

Almost........!    The Blue Page, by Thomas Gainsborough, circa 1770-72.

Boy in a Blue Shirt, by Joan Eardley, circa 1950s.

Cortlandt Field Bishop, by William-Adolphe Bouguereau, 1873.

Boy in the Blue Jacket, by Amedeo Modigliani, 1918.

Boy in a Striped Sweater, by Amedeo Modigliani, 1918.

Jacques de Chapeaurouge, by Jean-Étienne Liotard, 1744 (? More likely circa 1746-49).

The Irish Boy in Blue Denim (Anthony Lavelle), by Robert Henri, 1927.

Charles-Philippe de France, comte d'Artois, later Charles X, by Jean-Martial Frédou, 1773. (Father of the duc d'Angoulême, above.)

Blue Boy with the Banana, by Diego Rivera, 1931.

Boy in Sailor Suit (John Goldsmith), Boris Grigoriev, circa 1923-24.

Pojke med Apelsin (Boy with Orange), by Axel Jungstedt, 1882.