title: How can I make Bootstrap icons work on dark background?
body: <p>I'm using the <a href="http://bootswatch.com/cyborg/" rel="noreferrer">Bootswatch Cyborg theme</a> of Twitter's <a href="http://twitter.github.com/bootstrap/index.html" rel="noreferrer">Bootstrap library</a>. However, the Cyborg theme has a dark background and light foreground colors, a negative look from the Bootstrap defaults. The icon set PNG assumes a light background, and doesn't show in the Cyborg theme. Is there a corresponding icon set for dark backgrounds? I couldn't find one on <a href="http://glyphicons.com/" rel="noreferrer">Glyphicons</a>' site. Is there an easy trick to turn the icons into the negative color?</p>