The first print of the series, called The constant colour circle, presents a colour wheel based on the three traditional primary colours from art history – red, yellow, and blue – that transitions smoothly from one hue to the next through three secondary and eighteen intermediate colours. The constant colour circle functions as a base for the colour mixtures featured in all of the other circles in The colour circle series.
For the second part of the series, Eliasson took the primary colours as a point of departure. For The blue colour circle, for example, he added a tiny amount of each of the other hues from The constant colour circle to the primary blue in order to create a colour wheel of various blue tones. He used the same technique for the red and yellow circles, yielding a wide range of intermediate tones.