Bracket color fix

Bracket color property should be more specific, than tag color, to differ, and be more similar to Sublime Monokai theme.

From:
![2015-01-01 22-38-00](https://cloud.githubusercontent.com/assets/2114489/5592988/179e8d7e-9207-11e4-8e5a-5ca72e91597a.png)

To:
![2015-01-01 22-38-32](https://cloud.githubusercontent.com/assets/2114489/5592990/29faceec-9207-11e4-840b-8229f52a7d76.png)