I've collected almost 200 pieces of art that invoke a certain feeling and I never realized what the connection was between all of them.
Generally earth tones are associated with action, change and intent then. Purples, blues, whites and anything relating to water or mist were associated with peace, spirituality or Harmony.
And then for shapes the more complex the more horrifying or daunting something is. And then the more abstracted something is the more settled and friendly something is.
Maybe I'm just crazy but this is the general mood board I made.