Open the built-in Appearance panel
Open any IDU portal page and scroll to the bottom. Expand IDU+ Appearance. The userscript adds this panel directly to IDU, so you do not need to edit the .user.js file.
Theme
Switch between Light and Dark mode for the entire portal.
Layout
Portal keeps the classic IDU+ flow. Sidebar creates a modern app shell with collapsible navigation.
Title Font
Choose Aligra, Inter, Audex, or Otfits for headings across IDU+.
Accent
Choose IDU blue, Sea teal, Soft violet, Rose, Amber, or Moss—or enter a custom hex color.
Topbar
Choose IDU navy, Graphite, Steel blue, Deep green, Aubergine, Walnut, or a custom hex value.
Changes apply immediately and are saved in Safari for future IDU visits. Use Reset to restore Light, Portal, Aligra, IDU blue, and IDU navy.