Adjust alerts text color to pass WCAG 2.0 Luminance.

Fixed alerts on the right side
[
![adjusted alerts](https://f.cloud.github.com/assets/722891/291947/b50b69bc-9315-11e2-804b-e5f3cd76232e.png)
Colour Contrast Check web utility] (http://www.snook.ca/technical/colour_contrast/colour.html)