Ask any question about CSS here... and get an instant response.
Post this Question & Answer:
How can I use CSS variables to manage a color theme across my website?
Asked on Jan 30, 2026
Answer
CSS variables, also known as custom properties, allow you to define reusable values, like colors, that can help maintain a consistent theme across your website. Here's how you can use them for color theming.
<!-- BEGIN COPY / PASTE -->
<style>
:root {
--primary-color: #3498db;
--secondary-color: #2ecc71;
--background-color: #ecf0f1;
}
body {
background-color: var(--background-color);
color: var(--primary-color);
}
h1 {
color: var(--secondary-color);
}
.button {
background-color: var(--primary-color);
color: #fff;
padding: 10px 20px;
border: none;
border-radius: 5px;
}
</style>
<body>
<h1>Welcome to My Website</h1>
<button class="button">Click Me</button>
</body>
<!-- END COPY / PASTE -->Additional Comment:
- CSS variables are defined within the ":root" selector to make them globally accessible.
- Use the "var()" function to apply these variables in your styles.
- Changing the value of a CSS variable in one place updates all instances where it's used, simplifying theme management.
- CSS variables can be overridden in specific contexts, such as within a specific class or media query, for more dynamic theming.
Recommended Links:
