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Color & Design tool

CSS Variables Generator

Turn a palette into ready-to-paste CSS custom properties.

Runs on-deviceNo sign-upFree
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CSS Variables Generator workspace

Workspace

CSS Variables Generator

Runs locally

Screen-accurate enough

Values are calculated on the fly. CMYK is an approximation for screen preview; use a colour-managed proof for print.

Values & CSS0 chars

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

CSS Variables Generator is a free browser-based color & design tool. Turn a palette into ready-to-paste CSS custom properties. It runs with JavaScript and Canvas colour conversions locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is CSS Variables Generator?

CSS Variables Generator is a free browser-based color & design tool from utils.sbs. Turn a palette into ready-to-paste CSS custom properties. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

CategoryColor & Design
InputHEX, RGB or HSL values, or an image for colour sampling
OutputCSS, JSON or a generated colour palette
EngineJavaScript and Canvas colour conversions
ProcessingIn your browser
PriceFree
AccountNot required

How CSS Variables Generator works

Colour values are converted with standard colour-space formulas and generated as CSS, design tokens or image palettes.

How to use CSS Variables Generator

  1. 1Open CSS Variables Generator and add your input.
  2. 2Adjust the options: primary, secondary, accent.
  3. 3Run the tool, check the preview or result, and download the output.

When to use CSS Variables Generator

  • Build a palette for a website or design system.
  • Convert colour values between HEX, RGB and HSL.
  • Check contrast or sample colours from an image.

Inputs and options

Primary
Set this value before running the tool.
Secondary
Set this value before running the tool.
Accent
Set this value before running the tool.

Limitations

Screen colour and colour-space differences can change how values appear on other devices.

Privacy and accuracy

CSS Variables Generator processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

CSS Variables Generator questions

  • What can I do with CSS Variables Generator?

    Turn a palette into ready-to-paste CSS custom properties. CSS Variables Generator is part of the Color & Design shelf on utils.sbs and is designed for quick, one-off tasks.

  • Is CSS Variables Generator free to use?

    Yes. CSS Variables Generator is free, requires no account, and has no per-file or per-use charge.

  • Are my files uploaded when I use CSS Variables Generator?

    No. CSS Variables Generator is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

  • What formats does CSS Variables Generator support?

    It accepts colour values and returns CSS, JSON or a generated palette that you can copy or download.

  • Can I use CSS Variables Generator on my phone?

    Yes. CSS Variables Generator is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

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