Check your font
I came across a few cool tools for working with fonts and css.
Typetester is an alternative to
fiddling around with CSS in order to test out font settings.
I also found Designer Plaything,
which, while a little rough around the edges, provides a useful alternative
to Typetester in that you can try out different headline / body copy combinations.
With some more font options and some further development — more customization
options, user-defined text, the addition of sub-headings — this could
turn into quite a useful tool.
Designer Plaything also provides a brightness and contrast check of your color
settings, which is a nice touch.
Aother is Font Tester
It’s very customizable and, like Typetester, allows you to compare fonts against
each other.
However, it doesn’t include the option to compare headings alongside body copy.
It also seems a little bug-prone which precludes me from recommending it wholeheartedly.
For example, in Firefox changing the number of columns via the ‘View’ option
causes the example text to disappear.