The first lady's office declined to comment on Michelle Obama's color choice. Pelosi's office said the wave of purple was merely a coincidence, at least on her part.
Obama, Biden and Pelosi weren't the only heavy-hitters wearing the popular color. House Minority Leader John Boehner also wore a light purple tie. Even several guests, including Rebecca Knerr, a guest of Michelle Obama's, who sat next to her, wore purple.
Knerr was a guest of the first lady and represented her husband, firefighter Capt. II Joseph Knerr, who is currently serving in Haiti. Knerr herself is a former firefighter and paramedic.
In attendance at the State of the Union were also many bright red and yellow suits, a departure from the sober colors that sometimes define political events. And the change did not go unnoticed.
"Hillary Clinton didn't attend Barack Obama's first State of the Union address last night, but she was there in spirit, fashionwise if not in other ways we're not qualified to discuss," quipped an article in today's New York magazine.
"Bright yellow was a disturbingly popular choice," the article said. "Oh, Washington: Why? We don't expect this crew to be poring over runway slideshows and reading fashion magazines to keep up with the latest trends, but even that's not required for most people to look in the mirror and have even a vague notion that the look isn't flattering for probably anyone (it was questionable on Cher in "Clueless"), and that many other options would look better."
Experts say with the number of women in Congress growing, expect the trend of bright colors to continue.
"I think the composition of Congress has changed, and there's more women, and I think because of that you're going to have more color," Clements said. "I think women have the ability to have a lot of different fashion choices than men."