The Elements of Typographic Style, by Robert Bringhurst
Visual Display of Quantitative Information by Edward R. Tufte, Envisioning Information by Edward R. Tufte
Visual Explanations: Images and Quantities, Evidence and Narrative by Edward R. Tufte
Beautiful Evidence by Edward R. Tufte
Small Is Beautiful by E. F. Schumache
The Art of Color by Johannes Itten
Were I to teach a course, that would be the list of text books required (so you would own them after). First and only assignment---read them. Final and only exam---what did you learn and understand. Supply proof.
The Art of Color: The Subjective Experience and Objective Rationale of Color
http://www.amazon.com/Art-Color-Subjective-Experience-Object...
The Elements of Color: A Treatise on the Color System of Johannes Itten Based on His Book the Art of Color
http://www.amazon.com/Elements-Color-Treatise-System-Johanne...
(Read: http://www.psy.ritsumei.ac.jp/~akitaoka/shikisai2005.html)
So when an article lists all the colours along with the emotions they represent and says things like that red is associated with excitement, strength, sex, passion, speed, danger - it raises my BS signal.
It means they're copying some pseudo science article they read in a fun coffee table magazine once.
If you're really interested in colours and colour psychology, let me recommend:
Website: Color Matters http://www.colormatters.com/entercolormatters.html
Book: The Art of Color by Johannes Itten http://www.amazon.com/Art-Color-Subjective-Experience-Object...
The literature on hue harmony is fuzzy, but there are a few gems.
Check out Matsuda [1] who tracked the colors of what his female students were wearing, and tried to identify any principles informing their color choice. My criticism of him is that he plotted hue distribution on the RGB color wheel. The RYB wheel would have been a far better choice. His paper is in Japanese, but is summarized in multiple places. Below [2] is a link to 2 pages from a lecture I gave which summarizes his findings.
I'm sure you also know of Kuehni's classic tome on color spaces [3]. A fun and informative read.
There has been no research on hue antagonism (which is the idea that underpins complementary pairs). This is crazy, as it would be a very easy subject to investigate. To me it is obvious that there is a special relationship between antagonistic pairs above the fact that they mix to neutral. Supporting this is the fact that Leondro DaVinci documented this relationship even before hue circle was invented [4]!
As for the mystical dimension of color harmony... this has been assumed since the dawn of color science. Newton himself believed that there was seven colors in his hue circle for no other reason than this was a spiritually significant value [5]. Itten [6], Goethe [7] and Kandinsky [8] all absolutely believed in the spiritual dimension of color. Personally, I believe that their work has had nothing but a destructive impact on how artists and designers use color. It is wildly inconsistent, vague and often plain wrong.
[1] Matsuda: Color Design. Asakura Shoten (in Japanese). (1995)
[2] https://www.dropbox.com/scl/fi/4ac93etjyg0z5y2ouq5ge/matsuda...
[3] Kuehni, R.: Color Space and its Divisions: Color Order from Antiquity to the Present. Wiley-Interscience, Hoboken (2003)
[4] Leonardo da Vinci, Trans. J. F. Rigaud, A Treatise on Painting (London: J.B. Nichols & Son, 1835).
[5] Matt Chamings “Why are there seven colours in a rainbow?” New Scientist, Last Word, 2021.
[6] Johannes Itten, The Art of Color: The Subjective Experience and Objective Rationale of Color (New York: Reinhold Publishing Corporation, 1961).
[7] J. W. v. Goethe, Goethe's Colour Theory, Trans. C. L. Eastlake (London: John Murray, 1840).
[8] Wassily Kandinsky, Trans. Michael Sadler, Concerning the spiritual in art (Penguin UK, 2024), p. 59.