About this app

Check color contrast ratios instantly. Validate your designs against WCAG 2.0 accessibility standards with real-time preview across AA and AAA levels. Contrast Checker is the essential tool for designers and developers who care about accessibility. Whether you're building a brand new interface or auditing an existing design, this app helps you ensure every color combination meets the highest accessibility standards. KEY FEATURES - Real-Time Contrast Ratio Calculation Enter any two colors and instantly see the contrast ratio. Results update in real time as you adjust your palette. - WCAG AA & AAA Validation Check your color pairs against both AA and AAA compliance levels for normal text, large text, and UI components. - Smart Color Suggestions When a color combination falls short, get intelligent suggestions for accessible alternatives that stay close to your original palette. - Hex, RGB & HSL Support Work with colors in whatever format suits your workflow. Switch seamlessly between Hex, RGB, and HSL inputs. - Visual Preview See how your text and background combinations actually look with a live preview, so you can make informed design decisions at a glance. - Share & Export Results Easily share contrast check results with your team or export them for documentation purposes. BUILT FOR DESIGNERS Contrast Checker was created with design professionals in mind. The clean, focused interface lets you work quickly without distractions. Whether you're a UI designer, front-end developer, or accessibility consultant, this tool fits naturally into your workflow. WCAG 2.0 STANDARDS The Web Content Accessibility Guidelines (WCAG) define minimum contrast ratios to ensure content is readable for people with visual impairments. Contrast Checker makes it effortless to verify compliance, helping you build inclusive digital experiences.

Latest release

What’s New

Version 1.0.3 Jul 22, 2026

軽微な改善とバグ修正を行いました。

Audience growth

Ratings growth

Steady

7-day gain +0

Ratings / day 0.0

30-day gain +0

US rating-count history

0 ratings

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking