To change the color for normal text the ST0 class needs the "color" attribute to be added. Note that in the style sheet code the first block of attributes contains settings for TBG, ST0, ST32, etc. and this includes the text color. In order to override this setting for ST0 the style sheet must contain a different attribute block with a new setting for the "color" attribute.
For example, the following image demonstrates how to make the ST0 class make text display in lime green.
When previewed the text should display in lime green.
