A color / colour is the visual perception of a discrete category of the visible spectrum of light.
Colors evoke emotions and have certain associations.
Red is the color of love and passion, but also that of blood and the evil. It signals "Stop!", it is warning and alert symbol, which triggers attention, marks errors and can denote awkwardness and guilt. In short red is a color that is loaded full of strong emotions. If someone writes something in red achieves with this a similar effect as would the message be completely in capital letters and or every word underlined - s/he screams in a written manner. Therefore, Comments or corrections shall not be in Red, but rather in other color as Red would lower the sympathy [http://denigma.de/url/3m].
Blue in contrast signals loyalty and internationality.
Gold represents faith, healing and blessing.