What 1918 painting by Georgia O'Keeffe is known for its dark, radiating forms?

Georgia O'Keeffe's 1918 painting known for dark, radiating forms is Music, Pink and Blue, No. 2.

The work belongs to O'Keeffe's early abstract period, when she used curved bands, tonal contrasts, and expanding shapes rather than recognizable objects. The title connects the visual rhythm of the forms with music, a recurring idea in her early work.

O'Keeffe did not usually explain her paintings as literal illustrations of songs or compositions. Her musical titles instead suggest movement and emotional response. Several similarly titled works from this period can cause confusion, so the full title and number are important when identifying this painting.