Sources & References
Books
Two Authors, Johann Wolfgang van Goethe & Charles Lock Eastlake (2015) Theory of Colors
One Author, Hilde Franq (2017) Kleur verkoopt (dutch)
One Author, Morton Walker D.P.M. (1990) The Power of Color
One Author, Faber Birren (2013) Color Psychology and Color Therapy
One Author, Johannes Itten (2002) Art and Color
Website
Pimpernel Brouwer, Kleur en veiligheid (2008) http://www.ontdekjekleuren.nl/userfiles/files/kleurveilig.pdf (dutch)
Brieneke van den Einden, De psychologie van kleur (2015) https://www.zoso.nl/blog/de-psychologie-van-kleur (dutch)
Seth James Haringa, Het psychologisch effect van kleuren http://www.stidolph.nl/het-psychologisch-effect-van-kleuren/ (dutch)
Angelina Wright, Psychological properties of colours http://www.colour-affects.co.uk/psychological-properties-of-colours
Psychologenie staff, The power of colors https://psychologenie.com/the-power-of-colors-their-meanings
Pioneers of color psychology
Johann Wolfgang von Goethe, Scientist
Carl Gustav Jung, Psychiatrist & Psychologist
Johannes Itten, Artist, Designer & Teacher