Clean up the embeddable latest version SVG colors

I tried an experiment with the artifact version colors, but in retrospect they were a mistake. This is cleaner, and IMO quite a bit better.
![screen shot 2014-07-07 at 7 52 14 pm](https://cloud.githubusercontent.com/assets/10421/3503840/23306224-063a-11e4-82ab-b5c73c2be0d6.png)