By default, the body text like this is colored using the “primary” color for the current theme. An admin can change this by going to:
Preferences → Admin → Customize
- Click ‘Add Color Scheme’ or select an existing one to edit.
- Click the edit icon next to the color scheme name.
- Click any of the color fields to choose a different color.
One thing to note is that many other parts of the site get their color from the “primary” color, so changing this may cause unwanted side effects. CSS rules can be used to set color more directly for specific parts.
