# Qolor: Dynamic Theme Engine

> Build perfect, harmonious Firefox themes using a cutting-edge OKLCH colour engine.

Canonical page: [https://chrome-stats.com/d/qolor](https://chrome-stats.com/d/qolor)

## Overview

- **ID:** `qolor`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Raphael Quintão
- **Category:** appearance
- **Daily users:** 7
- **Rating:** 4.89 / 5 (9 ratings)
- **Version:** 2.0.1
- **Last updated:** 2026-04-27
- **First published:** 2019-04-18
- **Size:** 5.01 MB
- **Data as of:** 2026-09-16
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/qolor/)
- **Website:** [https://github.com/raphaelquintao/Qolor/issues](https://github.com/raphaelquintao/Qolor/issues)

## Description

Qolor is a dynamic, smart theme engine that generates modern, high-quality Firefox themes. It uses the cutting-edge OKLCH color space. This makes every combination look and feel perceptually perfect.

Features
<ul><li><strong>Total UI Coverage</strong>: Most tools only change the toolbar. Qolor styles everything—popups, sidebars, menus, and interactive button states—for a truly seamless look.</li><li><strong>OKLCH Color Space</strong>: The OKLCK color space allows Qolor to create harmonious palettes that maintain consistent lightness and saturation, ensuring every element is visually balanced.</li><li><strong>Intelligent Shades</strong>: Smart algorithms automatically adjust shades for optimal contrast and readability.</li><li><strong>Always With You</strong>: Full seamless integration with Firefox Sync.</li><li><strong>Open Source</strong>: Fully open source and free to use, with the source code available on GitHub. Contributions and feedback are welcome!</li></ul>
<em>A modern, advanced alternative to Firefox Color for users who want total UI coverage and automated contrast control.</em>

## Rankings

- #37,724 — Overall
- #120 — engine

## Permissions and access

### Permissions

- `theme`
- `storage`
- `unlimitedStorage`
- `browserSettings`
- `management`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Manages other extensions, which allows oversight but might intervene with user configurations and choices.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/qolor)