Switch color schemes (vanilla js)

• Light, dark, and auto (system) modes.
• Keyboard accessible: Tab to focus radios, Left/Right arrows to toggle options.
• Saves choice in localStorage.
• When "auto" is selected, system preference applies.
• Background/text color toggles between lavender (light) and navy (dark).
• No external libs, easy to copy and customize.

Demos

< toolbox