To change font color and style you should edit FLA file.
1) First thing you need to do is to locate text field you need to update
2) Then you need to select the text field you need to update and see properties tab for font, size, color and other text options – you can change it easily
3) All the text in the templates are edited same way – you need to locate text field, and set the text field properties as you need.
Note: if you need to change color of some separate word in plain text you should edit it via XML. see XML Flash How to modify colors .
Feel free to check the detailed video tutorial below:Xml Flash. How to change a font style