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CSS Variables Generator

Generate a set of semantic CSS Custom Properties (`--vars`) from a color palette.

What is the CSS Variables Generator?

The CSS Variables Generator turns a color palette into a set of CSS custom properties declared inside a :root block. Define each color with a name and value, and the tool produces ready-to-use variables along with a usage example.

CSS custom properties make a stylesheet easier to maintain by keeping color values in one place. This tool lets you build that block visually, add or remove colors, and rename variables without writing the syntax by hand.

It is free and runs entirely in your browser with no signup. The CSS is generated client-side and nothing is sent to a server.

How to use the CSS Variables Generator

  1. 1Set a prefix in the Variable Prefix field, which is combined with each color name to form the variable.
  2. 2Edit the default color rows by changing their names and picking values with the color picker or hex field.
  3. 3Click Add Color to create a new variable, or use the remove button to delete one.
  4. 4Review the generated :root block and the usage example showing how to reference each variable.
  5. 5Click Copy CSS to copy the custom properties into your stylesheet.

What you can use it for

  • Defining a semantic color palette such as primary, secondary, success, and danger for a project.
  • Setting up the color tokens for a design system before building components.
  • Creating a theme block that can be overridden in a dark-mode scope.
  • Standardizing brand colors across a codebase so they are changed in one place.
  • Quickly prototyping a palette and exporting it as CSS to share with a team.

Key features

  • Editable color rows with both a color picker and a hex input for each value.
  • A configurable prefix so variables follow your naming convention.
  • A generated usage example showing var() references for every color.
  • A live color preview grid that shows each swatch with its name and value.

Frequently asked questions

What are CSS variables?

CSS variables, also called custom properties, are reusable values declared with a double-dash prefix, usually inside a :root block. You reference them with the var() function, and they cascade and can be overridden within specific scopes.

Is the CSS Variables Generator free?

Yes, it is free and requires no signup. It runs entirely in your browser, so you can generate and copy as many variable sets as you need.

How do I use the generated CSS variables?

Paste the :root block into your stylesheet, then reference any variable with the var() function, for example color: var(--color-primary). The tool also outputs a usage example so you can see the exact syntax for your variables.

Can I change the variable names and prefix?

Yes. Each color row has an editable name, and the Variable Prefix field controls the first part of every variable. A prefix of color and a name of primary produce the variable --color-primary.

Can I add more than the default colors?

Yes. Click Add Color to append a new row, then rename it and choose a value. You can also remove any color you do not need with the row's delete button.

Does this tool support values other than colors?

The generator is built around color variables and includes a color picker for each row. You can type any value into the hex field, but the preview and picker are designed for color values.

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