Really nice execution!
I remember seeing similar projects [1][2] in the past and pondered usage of the `currentColor`.
Btw, there are several occurrences of white components [4]; they are necessary for "breaking" lines, but surprisingly there are very few of them and overall do't break much [3].
[1] http://cikonss.zzapdeveloped.it/ [2] http://one-div.com/ (warning, hugely ad infested currently) [3] console: document.styleSheets[0].insertRule('.iconWrapper,.iconViewer{background-color: #999 !important}',0)