"Matisse in Black and White" at Paul Kasmin, 297 Tenth Avenue (new entrance on 27th street). Through December 19. Reservations may be made at gallery website and are recommended but not required.
"Anne Truitt: Sound," at Matthew Marks, 523 West 24th Street, through December 19. No reservations needed.
"Jill Nathanson"at Berry Campbell in Chelsea, January 7 to February 6, 2021.
"Jules Olitski -- Color to the Core; Paintings: 1960-64," at Yares Art, 745 Fifth Avenue, through January 30, 2021. No reservations needed.
"The Fullness of Color: 1960s Painting," at the Solomon R. Guggenheim Museum, New York, through March 14, 2021. Nine colorful abstractions, including one each by Kenneth Noland, Morris Louis, Jules Olitski & Helen Frankenthaler.
Also at The Guggenheim:"Away from the Easel: Jackson Pollock's 'Mural,'"exhibition focused on 1943 transitional masterpiece, not seen in NYC for 20 years and freshly restored since by Getty Museum conservationists; through September 29, 2021.
Note: The Guggenheim has reopened, but only for 5 days a week, access is limiited to 25 percent of capacity, and timed tickets (available at the museum's website) must be reserved in advance.