File: htdocs/themes/xswatch4/tpl/xswatchCss.tpl

<{* pick the css directory you want to use by entering its name on the bottom line.
Valid values are:
 css-cerulean  css-cosmo     css-cyborg    css-darkly    css-flatly
 css-journal   css-litera    css-lumen     css-lux       css-materia
 css-minty     css-pulse     css-sandstone css-simplex   css-sketchy
 css-slate     css-solar     css-spacelab  css-superhero css-united
 css-yeti

If a file name is specified in xswatchDarkCss.tpl, the name below will be
used for media="(prefers-color-scheme: light)" queries.
*}>
css-cerulean