Make website more accessible

Hi, the keybase.io website takes the “modern” low-contrast grey-on-grey / pale-blue-on-ivory / ultra-slim-font design to an extreme, to a point where I have to use Everynote Clearly to make the text legible.

Yes, this is a rant, but also a very real problem of https://en.wikipedia.org/wiki/Web_accessibility.

Start by reviewing the keybase.io website against the accessibility concern described in this issue, especially low contrast and ultra-slim text. Define specific affected pages and measurable readability goals; the work is done when the identified accessibility problems are addressed and the improvements can be verified.

Written by the indexing model from the issue text.