Our soul becomes dyed with the colors of our thoughts.
It is quite a nice metaphor to represents how the way we think affects the way we feel and not the other way around.
On a more spiritual note, a color can trigger an emotion and certain emotions remind us of certain colors.
There is apparently a correlation between the colors you choose to wear on a daily basis and the color of your thoughts.
What color are you wearing right now? It could indicate your current state.
Alternate Dimension 
This was a pleasure to read. I like the idea that our thoughts have colors.
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There are also spiritual meanings to colours. For example, right now I’m wearing blues and greens. These would be power/fear of the Almighty and expansion/verdure respectively. I have a whole chart on this and find myself wearing the colours which I will be working in that day quite frequently. It is not too different from your colour chart, but varies in some ways.
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