Color Wheel Solid Color Generator

A lightweight, dependency-free web tool that allows users to select precise single-tone colors from a circular color wheel, preview the selected tone, and download it as a solid PNG swatch in various predefined paper sizes (A0–A10). Designed for designers, artists, and UI developers who need accurate color extraction and quick asset export.

Features

Circular color wheel with pixel-accurate color sampling

Live color preview

Single-tone color generation (no gradients)

Export PNG swatches in A0–A10 formats

HTML/CSS/JS implementation (no frameworks required)

Fast, responsive, and lightweight

Paper Sizes Supported

Includes predefined formats in mm, cm, and inches:

A0 → 841×1189 mm

A1 → 594×841 mm

A2 → 420×594 mm

A3 → 297×420 mm

A4 → 210×297 mm

A5 → 148×210 mm

A6 → 105×148 mm

A7 → 74×105 mm

A8 → 52×74 mm

A9 → 37×52 mm

A10 → 26×37 mm

How It Works

Click or drag on the color wheel to pick a color.

The color preview updates instantly with the selected tone.

Choose a paper size from the dropdown.

Click Download PNG to save a solid-color image at the selected size.

Technologies Used

HTML5

CSS3

Vanilla JavaScript

Canvas API

Installation & Usage

Open index.html directly in a browser.

No build tools or servers required.

File Structure │ index.html │ style.css │ script.js │ assets/ │ └─ colorwheel.png

License

This project is licensed under the MIT License. You may freely use, modify, and distribute it.