This colour circle diagram is by Mary Gartside, the only known female colour theorist to have written about colour before 20th century. In writing about her diagram, she refers to it as a colour ball and this may predate German painter Philip Otto Runge’s three-dimensional drawings of a colour sphere (Farbenkugel) from 1810.
Alexandra Loske has suggested that Gartside can be regarded as a link between Moses Harris, who wrote ‘Natural System of Colours’ (between 1769 and 1776) and Goethe’s substantial publications on colour in the early nineteenth century.
An English water colourist, Gartside was born before 1765 and died after 1808 (exact dates not known). She wrote and illustrated three books: ‘An Essay on Light and Shade, on Colours, and on Composition in General’ (London, 1805), ‘An Essay on a New Theory of Colours, and on Composition in General’ (London, 1808), and ‘Ornamental Groups, Descriptive of Flowers, Birds, Shells, Fruit, Insects, &c., and Illustrative of a New Theory of Colouring’ (London, W. Miller, 1808). Thank you for the update @saschaloske