add color for web browsers 

like this

![20130510150614](https://f.cloud.github.com/assets/197517/487119/2e6d4ae0-b94b-11e2-8874-396e4bd3344e.png)

![20130510162739](https://f.cloud.github.com/assets/197517/487128/8ddc45a8-b94b-11e2-86bb-ca7d5afd797e.png)