TOLEDO, Ohio — Dan Robbins, an artist who created the first paint-by-numbers pictures and helped turn the kits into an American sensation during the 1950s, has died. He was 93.

Robbins, whose works were dismissed by some critics but later celebrated by the Smithsonian Institution's National Museum of American History, died Monday in Sylvania, Ohio, said his son, Larry Robbins.

He had been in good health until a series of falls in recent months, his son said.

A paint-by-numbers self-portrait of Dan Robbins from 1997. Larry Robbins / AP

Robbins was working as a package designer for the Palmer Paint Company in Detroit when he came up with the idea for paint-by-numbers in the late 1940s. He said his inspiration came from Leonardo da Vinci.

"I remembered hearing that Leonardo used numbered background patterns for his students and apprentices, and I decided to try something like that," Robbins said in 2004.

He showed his first attempt — an abstract still life — to his boss, Max Klein, who promptly told Robbins he hated it.

But Klein saw potential with the overall concept and told Robbins to come up with something people would want to paint. The first versions were of landscapes, and then he branched out to horses, puppies and kittens.

"I did the first 30 or 35 subjects myself, then I started farming them out to other artists," said Robbins, who mainly stuck to landscapes.

While the Craft Master paint-by-numbers kits weren't embraced initially, sales quickly took off and peaked at 20 million in 1955. Within a few years, though, the market was flooded, sales dropped and Klein sold the company.

Together, Robbins helped create slices of Americana that are still collected and are found framed in homes across the nation. Palmer still sells at least two kits: one remembering the Sept. 11 attacks and the other depicting the Last Supper.

"We like to think dad was one of the most exhibited artists in the world," Larry Robbins said.

Robbins, who spent much of his life in the Detroit area, was modest about his work and didn't get too bothered by those who mocked the paintings.