HTMLCSS Variables Generator
Build a complete CSS custom-properties design system from scratch. Define color tokens (primary, secondary, accent, background, text), typography (font family, sizes, line height, weight), and spacing scale. The tool outputs a ready-to-copy :root {} block that you can drop directly into your stylesheet.
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What are CSS custom properties?
CSS custom properties (also called CSS variables) are values defined once in :root {} and reused with var(--name). Changing a single variable instantly updates every element that uses it.
Can I use the output in any CSS framework?
Yes — the :root {} block is plain CSS. Paste it at the top of your stylesheet or inside a :root selector in your global CSS file.
How is this different from the CSS Variables Extractor?
The Extractor reads existing CSS and lists the variables found. This Generator creates a fresh :root block from your choices.