open-vault/website/source/assets/stylesheets/_syntax.scss.erb

pre.highlight code {
  color: #333333;
}

<%= Rouge::Themes::Github.render(scope: ".highlight") %>

pre.highlight {
  border: 1px solid #CCCCCC;
}

pre.highlight code span.c1 {
  font-style: normal;
  opacity: 0.8;
}