WCAG Color contrast checker icon

WCAG Color contrast checker Chrome Extension Analysis

Developer & Designer Tools

Chrome extension ID: plnahcmalebffmaghcpcmpaciebdhgdf

This is a browser-based accessibility tool that analyzes web page elements to check foreground and background color contrast ratios. It supports manual color picking, automatic refreshes upon DOM changes, and simulates various types of color blindness.

Developer:Jorge Rumoroso
Version:3.8.5
Size:158KiB
Last updated:

Overview

Installs

90K+

Rating

3.9

35 reviews

Languages

1 locales

Includes English

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

Backed by review samples

Macro category

Developer & Designer Tools

Pricing friction

Low review signal

Complaint intensity

Moderate review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

The extension positions itself as a technical utility for developers to ensure WCAG 2.2 compliance for color contrast. It emphasizes automated DOM scanning, real-time updates, and color blindness simulation features.

Inferred product pattern

Single-purpose technical developer utility with a maintenance-heavy codebase.

Review-backed pain points

Users struggle with the tool failing to launch or update, difficulty pinpointing specific elements among hundreds of results, and issues with accurately processing rgba or complex layered backgrounds.

Observed feature gaps

Lack of clear element identification for detected errors, inability to respect text-shadows in contrast calculations, and reliability issues on specific development environments like localhost/Svelte.

Tags
AccessibilityWCAGContrast CheckerColor BlindnessWeb Development
Target users

- Web Developers

- UI/UX Designers

- Accessibility Auditors

Primary use cases

- WCAG 2.2 contrast compliance testing

- Color blindness simulation for site testing

- Debugging color contrast on live DOM elements

Positive themes

- Utility for accessibility checks

- Useful color picking features

- Effective contrast simulation

Negative themes

- Broken functionality post-update

- Concerns regarding browser history permissions

- Failure to detect complex background/opacity scenarios

- Inability to identify specific problematic page elements

Observed friction

- Performance complaints detected

- Privacy complaints detected

- No payment required; tool is free, though users have expressed concern over data access permissions.

Evidence boundary: Evidence based on a mix of positive utility feedback and critical reports regarding technical breakage, privacy permissions, and limited diagnostic capabilities in complex layouts. Reviews span several years; recent reviews (2025-2026) focus on launch failures, while older reviews focus on privacy concerns.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

No official support channel mentioned; users report frustration with functional breakage and lack of updates.

Reliability

Multiple reports of the extension failing to launch, failing to detect correct colors, and breaking after updates.

Privacy

Users expressed significant concern and negative sentiment regarding the extension requesting access to browser history.

Access & pricing

- Free usage observed

- No account requirement observed

- Free plan or free usage claimed

Store listing facts

Listing assets

- Screenshots: 1

- Videos: 0

- Languages: 1

Trust signals

- Developer contact

Store metadata

- Version: 3.8.5

- Size: 158KiB

- Last updated:

Store description excerpt
Short excerpt from the public Chrome Web Store listing; full copy is available on the official store page.
It checks the color contrast between the foreground and background of the elements that are in the page according to the WCAG 2.2. It evaluates the contrast on all elements of the page considering their computed style for the color and background-color CSS properties. In case of these colors are defined with RGBA values, it also considers the opacity to deduce the real color that finally is show. It can simulate color blindness and evaluate the contrast for the simulations. By this way, developers can see how the pages look for colorblind users. The tool also includes two fields in which the colors can be introduced manually to be tested. It also allows to pick the color directly from the documents. Finally, it auto-refreshes when DOM of the page changes (addition or removing elements), but if the page has many changes, this behavior can be de-activated. Privacy statement on: https://ru…

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

WCAG contrast checkeraccessibility browser extensioncolor contrast ratio toolweb accessibility auditcheck contrast ratio

Comparison

WCAG checker alternativeaccessibility contrast tool

Problem

extension not workingcolor contrast detection errorbrowser history permission

Alternative

browser accessibility toolsdev accessibility extensions

Similar extensions

Jump to related discovery paths:

FAQ

What is WCAG Color contrast checker mainly used for?
This is a browser-based accessibility tool that analyzes web page elements to check foreground and background color contrast ratios. It supports manual color picking, automatic refreshes upon DOM changes, and simulates various types of color blindness.
What market signals stand out?
Visible niche traction with limited review base. Last known update: 12/27/2025.
What should builders compare before entering this space?
Compare install concentration, rating quality, update recency, screenshots, developer portfolio, listing claims, and review-backed friction signals.
Is this page review-backed?
Backed by review samples. This page combines store metadata with selected review signals, while raw store metrics remain visible for comparison.

Screenshots

WCAG Color contrast checker screenshot

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