Saw the "Carrying Tone" post.
I haven't written to it yet. But I thought I would share this. The post particularly the second slide, took me back to when I taught theatre and worked as a stage and lighting designer.
The over laid images are from a theatre design theory, Circa 1900, one I taught and was hugely influenced by in my design work.
The Four Moods.
Henry Edward Gordon Graig
Stage designer early 1900s
Movement, action, words, colour and rhythm, a strong means of conceptualization, combining in a dynamic form.
Early Italian painters and architects, such as Duccio and Sebastiano Serlio, as well as the Japanese theatre, influenced Craig to pursue a "total" theatre, with an emphasis on dance and colour symbolism.
Change the colour, change the tone, change the mood.