FK Željezničar Sarajevo is a professional football club based in Sarajevo, the capital of Bosnia and Herzegovina. Founded in 1921, the club is one of the most successful in the country, having won numerous national championships and cups. The team's colors are blue and white, and they play their home matches at the Grbavica Stadium. The club has a strong fan base known as the Fukare, who are known for their passionate support. FK Željezničar has a historic rivalry with FK Sarajevo, known as the "Sarajevo Derby," which is one of the most anticipated matches in Bosnian football.