Fix weird highlight line color

**Before:**
![before](https://f.cloud.github.com/assets/1398228/44924/f1db463c-571f-11e2-8598-9589eccbc43e.png)

**After:**
![after](https://f.cloud.github.com/assets/1398228/44925/f8fee0ea-571f-11e2-8cf0-6f81193b38c6.png)