We all know that national colors exists, often associated directly with the flag of a nation. Red and white for example are one of the most frequently used colors world wide by many nations (Austria, Poland, Japan, Indonesia, ...), also blue (US, France, UK, Russia).
Black on the other side today is only used by one of the major nations: Germany. It was also used in the past by its predecessor states, the Third Reich, the German Empire, and also many of the different German states before unification like Prussia. Austria also used Black in combination with Yellow for most of its history and only abandoned that after World War One around 1920.
Which leads us to my question - why are the central Europe nations the only major nations to use the color black as their national colors in the past and today? Does it symbolize something special?