Theme Switcher

Change application appearance between Light, Dark, and System themes.

Change application appearance between Light, Dark, and System themes. Theme Switcher allows customization of visual interface colors to match personal preferences or reduce eye strain, with automatic system detection for seamless adaptation to operating system settings.

Capabilities

• Switch between three theme options (Light, Dark, System)
• Access theme controls from user profile menu
• Apply theme changes instantly without page reload
• Persist theme preference across sessions and devices
• Automatically detect and follow system theme when System option selected
• Preview theme changes immediately upon selection
• Maintain theme consistency across all application pages

How to Use

1. Open user profile menu:

   • Click user profile button at bottom of sidebar (shows avatar and name)
   • Profile menu opens displaying user information and settings

2. Access theme switcher:

   • Locate theme switcher in profile menu below user info section
   • Theme switcher displays as three icon buttons in horizontal row
   • Current theme shows with highlighted/selected state
   

3. Select Light theme:

   • Click sun icon (first button) to activate Light theme
   • Interface switches to light background with dark text
   • Theme applies immediately across all pages
   • Selection persists automatically for future sessions

4. Select Dark theme:

   • Click moon icon (second button) to activate Dark theme
   • Interface switches to dark background with light text
   • Reduces eye strain in low-light environments
   • Theme selection saves automatically
   

5. Select System theme:

   • Click monitor icon (third button) to activate System theme
   • Application automatically detects operating system theme preference
   • Theme switches between Light and Dark based on OS settings
   • Updates automatically when system theme changes
   

6. Verify theme application:

   • Close profile menu by clicking outside or pressing Escape
   • Navigate through application pages to confirm theme consistency
   • Theme applies to all UI elements (sidebar, content, dialogs, buttons)

Requirements

Requirement	Details
Permission	Any authenticated user
Browser	Chrome, Firefox, Safari (latest 2 versions)
System	Operating system with theme detection support (for System option)
Storage	Browser localStorage enabled for preference persistence

Limitations

Limitation	Value
Theme options	3 themes (Light, Dark, System)
System detection	Requires browser support for prefers-color-scheme
Custom themes	No custom color schemes or user-defined themes
Persistence	Per-device storage (does not sync across multiple devices)
Transition	Instant switch (no animation or fade effect)

Not Supported:

• Creating custom theme color palettes
• Adjusting individual UI element colors independently
• Scheduling automatic theme changes by time of day
• Importing or exporting custom theme configurations
• Per-project theme preferences (theme applies globally)
• High contrast mode or accessibility-specific themes
• Theme preview before applying selection
• Reverting to previous theme with undo button
• Sharing theme preferences across multiple devices
• Custom icon sets for theme switcher buttons

Configuration

Setting	Default	Description
Default theme	System	New users start with System theme matching OS
Storage method	localStorage	Theme preference stored in browser localStorage
Storage key	theme	Key name for localStorage theme value
System detection	Enabled	Automatically detects OS theme when System selected
Application scope	Global	Theme applies to entire application uniformly

Related

• User Profile Menu - Accessing account settings and preferences
• Sidebar Navigation - Navigating between sections
• Language Switcher - Changing interface language