The first year of higher education is called 1.g (15–18 years old), the second year is 2.g (16-19) and the third year is 3.g (17-20). The age depends on when one started 0th grade and if one took 10th grade. When a student finishes 3.g, they get a white hat (studenterhue), with either a blue or a red ribbon around it. The colour of the ribbon depends on the school (HF, HTX, HHX = blue; STX = red). An education at STX involves all the lessons one can have in Denmark, while HHX and HTX are typically the lessons one chooses.