The official colors of the Kappa Alpha Psi fraternity are red and white, but the group's 100th anniversary celebration has Indianapolis seeing green.Members of the historically African-American fraternity, which was founded at Indiana University in 1911, are converging on the Circle City from across the country to celebrate the organization's legacy, 6News' Derrik Thomas reported."We are lawyers. We are judges. We are doctors. We are the university presidents. We are mayors of major cities. We are congressmen," said Grand Polemarch Dwayne M. Murray, the organization's president. "We are every walk of life making a difference."The convention will have an estimated economic impact of between $25 million and $28 million for Indianapolis.That's good news for hotels and restaurants, like Harry and Izzy's, which typically aren't busy immediately after a holiday."The weeks that they picked to celebrate their 100th anniversary are perfect for the city. The city has done a perfect job of cultivating the business and we are excited to have them," said Jeff Smith, managing partner at the restaurant.Along with the group's 100th anniversary, the Kappas have celebrated their 25th, 50th and 75th anniversaries in Indianapolis as well.Members said they're excited to take in what all Indianapolis has to offer."I'm going to be spending a little money here, and it has changed, especially downtown. It wasn't like this when I was here before, and it's changed for the better," said James Lucas, from Atlanta."It's a beautiful city. It's a clean city. They've been welcoming to the brothers here," said Barrington Scott, who is in town from Washington, D.C. "This is a great opportunity for us to be here."On Thursday, 60 busloads of members will visit IU's Bloomington campus, the birthplace of the fraternity.