Table II from <n>Pier Andrea Saccardo</n>'s 1891 color guide, <n>Chromotaxia, seu nomenclator colorum</n>.

<n>Winter Day's Feast</n>, an illustration by <n>Heikala</n> for a 2024 calendar.

A diagram from <n>James Sowerby</n>'s 1809 book, <n>A New Elucidation of Colours</n>.

<n>watercolour floral study no.16</n> (2024) by artist <n>Vinessa Redford</n>.

<n>Tide Pool</n>, a colored ink illustration by <n>Heikala</n> for her 2025 calendar.

<n>Tobias Mayer's Color Triangle</n> from 1775, published by <n>Georg Christoph Lichtenberg</n>.

Color charts from the 1890 book <n>The Principles of Harmony and Contrast of Colors</n> by <n>Michel Eugène Chevreul</n>.

<n>Plate 16, Principles of the science of colour</n> by <n>William Benson</n>, 1868.