Couleur (from French, meaning 'colour' in English) is the expression used in Central European Studentenverbindungen for the various headgear and distinctive ribbons worn by members of these student societies.
There are three classes of such student societies: The ribbon (so called Band) is worn over the right shoulder to the left hip.
These buttons are often engraved or enameled with a Zirkel and at times even specific coat of arms associated with the student society in question.
In the Flemish tradition new members wear the full colours, but on the left shoulder, instead of the right.
Traditionally, the Stürmer is only worn in the summer semester of the academic year.