CSS Variable Generator

Create CSS custom properties for your design system

Variables
CSS Output

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What are CSS Variables?

CSS variables (custom properties) let you store values like colors, fonts, and spacing in one place and reuse them throughout your stylesheet. They make themes easy to update and maintain. Define them in :root for global access.

Frequently Asked Questions

How do I use CSS variables?
Define with --name: value; Use with var(--name). They cascade and can be changed with JavaScript for dynamic theming. This makes maintaining themes incredibly easy and efficient.
Are CSS variables supported?
Yes, all modern browsers support CSS custom properties. They work in Chrome, Firefox, Safari, Edge, and mobile browsers. Support is over 95% globally.
Can I change variables with JavaScript?
Absolutely! Use document.documentElement.style.setProperty('--name', 'value') to update variables dynamically. Perfect for dark mode and live theming.