fix(variables.less): revert state color variables

I think the state variables right now do more bad than good. Those variables have negative effects in form validation and text state colors.

Before:
![image](https://cloud.githubusercontent.com/assets/399776/5323199/80577604-7c82-11e4-91da-6658bccbc355.png)

After:
![image](https://cloud.githubusercontent.com/assets/399776/5323258/e54ca976-7c82-11e4-9de8-317f0accd714.png)

^ I realize these aren't exactly canonized but I think the 2nd looks better in Canon and aligns with what CI has.