---
title: "Duo"
description: "Two-color pairing tool that shows every combination rendered as real UI so you can judge legibility, not swatches."
canonical: "https://vibing.inc/library/duo-vg-0656"
category: "Design Tools & Generators"
subcategory: "Color"
license: "free"
author: "Alex Pate"
source: "https://duo.alexpate.com/"
---

# Duo
Two-color pairing tool that shows every combination rendered as real UI so you can judge legibility, not swatches.
## Facts
- Source: https://duo.alexpate.com/
- Category: Design Tools & Generators / Color
- Author: Alex Pate
- Licence: free
- Tags: color, pairing, contrast, ui
## Why it's a gem
Single-purpose, single-dev, and better at its one job than any big suite.
---
Listed in The Vibeary: https://vibing.inc/library/duo-vg-0656 · JSON: https://vibing.inc/api/public/library/gems/duo-vg-0656