Change colors of output to dimmer colors.

Changed the color of the output to make it readable on white as well as on dark blue/black background. Describe is now magenta instead of yellow and passed tests are dark green. In the picture you can see the new output followed by the old output.
![pestercolorchange](https://f.cloud.github.com/assets/5735905/1888829/adfc8f68-7a12-11e3-9982-ed7138356237.PNG)