if you associate curtain colors to curtain sounds (synesthesia *), you will curtainly understand this concept, if you donīt, this table will help you to understand what synesthesia is.
* synesthesia:n. Physiol. Sensation produced at a point other than or remote from the point of stimulation, as of a color from hearing a certain sound (fr. Gk, syn = together + aisthesis = to perceive).
