All of the colors posted over a five year period are arranged in a radial chronological sequence.
Each post is represented by a curve. The curve is shaped by hue, saturation and brightness values.
"In Infographic Designers' Sketchbooks, more than fifty of the world's leading graphic designers and illustrators open up their private sketchbooks to offer a rare glimpse of their creative processes."
Infographic Designers' Sketchbook
Steven Heller and Rick Landers
Princeton Architectural Press (October 14, 2014) Amazon