devdocs/assets/stylesheets/global/_variables.scss

$baseFont: 'Open Sans', Helvetica, Arial, sans-serif;
$monoFont: 'Source Code Pro', 'Inconsolata-g', Consolas, Menlo, monospace;

$textColor: #39393e;
$textColorLight: #6b6f78;
$textColorLighter: #9498a6;

$linkColor: #0082c6;
$linkColorHover: #0072c5;

$headerHeight: 3rem;

$sidebarWidth: 18rem;
$sidebarMediumWidth: 16rem;

$mediumScreen: '(max-width: 800px)';

$headerZ: 1;
$sidebarZ: 2;
$contentZ: 3;
$noticeZ: 4;
$hoverZ: 5;