According to J.D. Beazley (Attic Red-figure Vase-painters, p. 352), the earliest works of the Colmar Painter "are very close to those of the Bonn Painter. His developed style was formed under the influence of Onesimos (in both stages of the artist's career) and the Antiphon Painter. He probably sat side by side with them in the workshop of Euphronios."
It has been postulated (see J.K. Davies, Athenian Propertied Families 600-300 B.C., pp. 359-361) that the Lysis praised on this cup and some 26 others listed by Beazley (op. cit., pp. 1597-1598) may be the grandfather of the Lysis from Plato's Dialogues, and whose grave monument, a marble loutrophoros, was discovered in 1974. The family connection was disputed by others (see R.S. Stroud, "The Gravestone of Socrates' Friend, Lysis", in Hesperia, vol. 53, Issue 3, p. 357, n. 7).