Updated README

README.md

 
 ![Hyde theme classes](https://f.cloud.github.com/assets/98681/1817044/e5b0ec06-6f68-11e3-83d7-acd1942797a1.png)
 
-To use a theme, add the `themeColor` variable under `params``, like so:
+To use a theme, add the `themeColor` variable under `params`, like so:
 
 **TOML**
 ```toml
 ```
 
 **YAML**
-```
+```yaml
 theme: "hyde"
+
 params:
   themeColor: "theme-base-09"
 ```