wxWidgets

wxWidgets provides a global colour database (wxTheColourDatabase). Unfortunately the documentation doesn't show the colors for an easy selection. The following code extracts the definitions from wx/common/gdicmn.cpp and converts them into HTML:

sed -e 's;^\s*{wxT("\([^"]*\)"),\([^\}]*\)\},?;<span style="color: rgb(\2)">\1</span><br />;' gdicmn.cpp |grep '<span' > colors.html