Can we talk about colours or describe them? Colours largely elude our conceptual thinking; they want to be seen, felt, experienced. They are at the center of our perception, and yet at the periphery of our language. We can name them, but everyone sees red, blue or green differently. Their origin is the light, as everything we know in the cosmos (ancient Greek: order, ordered state) is revealed by light. This leads us to discover a broader understanding of colours. When we speak here of the colours of the cosmic order, the cosmic colours, we need to ask the cosmos itself.
The idea of rays appears in almost all traditions and through all ages. They are always symbols of the Divine, i.e. of a cosmic origin. Rays represent an elemental force, and in their twelvefold form an analogy to universal creation.

Barbara Diethelm has materialized these cosmic colours by transforming them into colour substance (pigment colours), so that they become visible and tangible, and can enter into a creative interaction with humans. From the spectrum of origin, the five pure Sirius primary colours (the Sirius® Primary System) developed by Barbara Diethelm almost 20 years ago, the twelve cosmic colours have been derived shortly afterwards.

Barbara Diethelm combines the importance of focusing on the cosmic laws of nature and a new, forward-looking approach to colours.