Color is a form of non verbal communication. It is not a static energy and its meaning can change from one day to the next with any individual - it all depends on what energy they are expressing at that point in time.
For example, a person may choose to wear red on a particular day and this may indicate that this is their favorite (personality) color, or they are ready to take action, or they may be passionate about what they are going to be doing that day, or again it may mean that they are feeling angry that day, on either a conscious or subconscious level. All are traits of the color red.