---
title: Rank Your Colour Pairs by Which One Fails First — Free
description: Paste each colour pair with its measured contrast ratio and size, and the sheet ranks them so the two that fail the threshold are the first thing you fix rather than something a report mentions in passing.
category: accessibility
last_verified: 2026-09-13
freshness: green
published: 2026-09-13
canonical_url: https://gratis-ai.pages.dev/articles/color-palette-contrast-checker-2.html
companion_app_url: https://gratis-ai.pages.dev/apps/color-palette-contrast-checker-2.html
reading_time_minutes: 5
tags: accessibility, color-palette-contrast-checker
---

# Rank Your Colour Pairs by Which One Fails First — Free

Paste each colour pair with its measured contrast ratio and size, and the sheet ranks them so the two that fail the threshold are the first thing you fix rather than something a report mentions in passing.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $4 one-time. Nothing in the free tier is gated.

## Who it's for

Anyone seeking practical 100% free AI workflows — no paid API keys, credit cards, or subscriptions

## What's free

- Any number of pairs ranked
- Ratio and size scored with inputs shown
- Copy the sheet as text
- Stateful link to any result

## Optional paid add-on

**$4 one-time.**

- Printable sheet with the failing pairs boxed for a design review — estimate: 16 minutes saved per audit, basis: 5 pairs re-tabulated at ~3.2 minutes each
- Saved local history across audits — estimate: 11 minutes saved per audit, basis: re-entering 5 pairs at ~2.2 minutes each

## Sources & verification

- Tool: GratisAI local-first workflow (no key, no account)
- Primary source: https://notebooklm.google/ — checked 2026-09-13
- Last verification: 2026-09-13 (green)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/color-palette-contrast-checker-2.html
- Companion app: https://gratis-ai.pages.dev/apps/color-palette-contrast-checker-2.html
- This machine-readable mirror: /mirrors/color-palette-contrast-checker-2.md

*Generated free at https://gratis-ai.pages.dev/articles/color-palette-contrast-checker-2.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*