It is ultimately interesting phenomenon for me!
It is about perception of the world in connection with color (sound, numbers, letters)!
Edward de Bono developed a creative tool called "six thinking hats" that ensures that everyone in a group is talking from the same ground. If for example, you put black hat on, it is time to be critical, and if you put on the yellow hat, it is time to be appreciative.
Now I put yellow hat , cause I really appreciate this idea. How would change our everyday life, work, studies, if we could communicate with other people by showing our inner emotion with usage of colors?
Colors can be used in text messages, e-mails. You can show to other people "what color you are talking from". It is great! Cause in reality we have much more that 7 colors!
Let' color our life to be more emotional intelligent to each other, more open and free with each other!
By the way, one of the greatest Russian musician who had the same surname as I, Alexander Skryabin was one of the first in history, who connected music, movements, picture and color.
To know more about Synesthesia go here: http://en.wikipedia.org/wiki/Synesthesia