Add accessibility testing

[amtunlimited]

Please add some testing for people with vision impairment, along with making sure the best practices you propose don't mess with things like screen readers.

I bring this up because quite a few people have complained about the very low contrast between your default text and background, along with the default font's weight, and I agree with them.

I'm also not sure why the default font color is slightly blue shifted, but that's personal preference. I'd like to see it grayscale.

[robsheldon]

The default font color has been adjusted to #767676 by another reviewer's suggestion. Funny, it was wonky because I myself am fairly colorblind.

I'm looking into integrating some automated accessibility testing. Do you have any suggestions for a good tool for this?