Based on the colour wheel by Johannes Itten I modified the colours by increasing the transparency and the amount of black.

Different combinations by layering two colours revealed lots of well-paired colour shades. Also thought about different textures. Different layers of colours trough soft textures like clouds, fabric,...

Josef Albers was a German - born American artist who did lots of studies of colour. Trough the transparenz of colour he created new shades of colours. (last picture)

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josef albers interaction of colours