I wanted to have a dynamic color in Tailwind, using a syntax like this in JSX:

bg-${color}-500

But it wasn’t applied to the page because Tailwind couldn’t find, for example, the text bg-red-500 in the code, so the class was not included in the final CSS.

So instead I made a list of possible color options in a switch, and generated the class:

const getColorClass = (color) => {
  switch (color) {
    case 'green': return 'text-green-500'
    case 'blue': return 'text-blue-500'
    case 'red': return 'text-red-500'
    default: return ''
  }
}

And I used this function in my classes:

<h1 className={`mt-10 ${getColorClass(color)}`}>
...

A “quick way” is to write the classes you might need in a comment, like this:

/* possible grid values: grid-cols-1 grid-cols-2 grid-cols-3 */
<div className={`grid grid-cols-${data[0].length}`}>

In Tailwind v4 you can also safelist classes directly in CSS using @source inline():

@import "tailwindcss";
@source inline("text-green-500 text-blue-500 text-red-500");

This guarantees those classes are generated even if they do not appear in your HTML or JS files.

Lessons in this unit:

0:	Introduction
1:	Box model properties
2:	Colors
3:	Typography
4:	Flexbox and Grid in Tailwind
5:	Modifiers
6:	Responsive design in Tailwind
7:	Apply a style to children with Tailwind
8:	How to fix Unknown at rule @tailwindcss (unknownAtRules) in VS Code
9:	How to align center vertically using Tailwind
10:	How to use custom fonts with Tailwind CSS
11:	Setting up Tailwind CSS on Vite
12:	Show-hide an element based on existence of a parent class in Tailwind
13:	The Tailwind Cheat Sheet
14:	How to set up Tailwind CSS (v4)
15:	▶︎ You can’t generate classes dynamically in Tailwind