The kaleidoscope of colors enveloping the walls, floors and ceilings of Apryl Miller’s home may not be to everyone’s liking. But they served a clear purpose for Ms. Miller, an artist who raised her two daughters in the sprawling Upper East Side apartment.

“The idea always was to make a very special home for my children,” said Ms. Miller, who bought the unit brand-new with her former husband in 1998 and took sole ownership in 2002. “I wanted my daughters to feel they knew the place was for them. Color is rejuvenating, and colors have souls. I didn’t want white walls.”

Their vibrant home, much like a livable art installation, encompasses the 29th floor of the 31-story Siena condominium at 188 East 76th Street in the Lenox Hill neighborhood. Over the years, the apartment has been featured in various publications and social media posts, as well as in the Netflix documentary series “Amazing Interiors” and MTV’s “Teen Cribs.” And it has been part of the Open House New York tours.

ImageMs. Miller with her daughters, Dylan Sparkle and Lyris Faron.Credit...Brad Dickson for The New York Times

Ms. Miller, who is also a jewelry designer and a poet, is proud of the painstaking work she put into the quirky design and décor, with just about every color in the rainbow accounted for in her artwork and furnishings. But with her daughters, Dylan and Lyris, now grown and with living expenses rising, she said, it’s time to move on. “I always knew I couldn’t keep it forever,” she said. “It’s too big.”

The full-floor condo is on the market for $8.75 million, according to the listing brokers, Stan Ponte and Colin Montgomery of Sotheby’s International Realty, with monthly carrying costs totaling $14,708. The furnishings and artwork are not included in the sale, but they can be purchased separately.

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