Bauhaus, the German arts and crafts college, is 100 years old this year. One of the revolutionary features of its pedagogical programme was the methodology of teaching about colour, elaborated by Johannes Itten and Paul Klee, leading Bauhaus masters, and further developed by their disciples, Joseph Albers and György (George) Kepes. This methodological legacy is continued in a curriculum innovation experiment in art education that is currently being piloted in primary and secondary schools of Hungary. Developing colour perception, creation and communication are basic components of our curricular modules. In this article, we show the development of colour perception of 7,087 students in two age groups: 7-8.8 and 12-13.5 years, tested through arts-based tasks in an interactive, online platform. Evolution of colour sensitivity, recognition of colour and form, colour memory and decoding the meaning of colours will be shown and the relevance of the results for arts education indicated.