以彩色显示文件中的内容

I want to display the content from a file to a Textarea but i want the content to be colorful when displayed in the Textarea..Can anyone tell me how to set colors to the content in the file ??

Suppose I have 2 different files A.txt and B.txt and i want to display content from A.txt in RED and content from B.txt in BLUE in a single text area. Does anyone have an idea about that??

You can only use one color for a textarea's text through CSS.

textarea { 
  color: #f00; }