If social distancing were a color, what color would it be? Known for her brimming canvases and seamless color transitions, California artist Ruth Pastine—in her online exhibition “Depths”—meditates on the calamity of the last few months. These layered works on paper, luminous in the center, grow darker at their borders. As the artist herself reflects, she wanted to “explore and question ideas of isolation, uncertainty, and confronting the unknown,” while also “affording solace.” —E.C.