Home Courses Tailwind CSS Day 4
Day 04 Advanced Topics

Dark Mode and Custom Themes

Tailwind has first-class support for dark mode and a powerful theme customization system. This lesson covers the dark: variant, extending the default theme, and creating a custom design system.

~1 hour Hands-on Precision AI Academy

Today’s Objective

Tailwind has first-class support for dark mode and a powerful theme customization system. This lesson covers the dark: variant, extending the default theme, and creating a custom design system.

Dark Mode and Custom Themes is one of the most important topics in Tailwind CSS. This lesson builds the foundation you need before moving to more advanced concepts — take time with each example and run the code yourself.

Dark Mode

tailwind.config.js
TAILWIND.CONFIG.JS
export default { darkMode: 'class',  // 'media' uses OS preference, 'class' uses a CSS class // ...
}
HTML
HTML


  

  

    
Supporting Resources

    
Go deeper with these references.

    

      
        
Tailwind CSS

        

          Tailwind CSS Documentation
          Complete class reference, configuration guide, and responsive design docs.
        

        
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Tailwind UI

        

          Tailwind UI Component Library
          Official component library showing production patterns for common UI elements.
        

        
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GitHub

        

          Awesome Tailwind CSS
          Community collection of Tailwind plugins, tools, and starter templates.
        

        
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Day 4 Checkpoint

    
Before moving on, make sure you can answer these without looking:

    
    
      
  • What is the core concept introduced in this lesson, and why does it matter?
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  • What problem does Dark solve that simpler approaches cannot?
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  • Can you trace through the main code example in this lesson and explain each step?
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  • What are the most common mistakes made when first learning this concept?
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  • How would you explain today’s topic to a colleague who has never seen it before?
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Continue To Day 5

      
Production Optimization

    

    
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