ColorCheck Pro
WCAG Contrast Auditor for accessible designs
What is ColorCheck Pro? Complete Overview
ColorCheck Pro is a specialized tool designed to help designers, developers, and content creators ensure their digital content meets WCAG 2.1 accessibility standards for color contrast. The tool instantly analyzes any foreground/background color combination and provides clear pass/fail indicators for all WCAG compliance levels (AA and AAA, both normal and large text). By addressing the critical need for accessible color choices in digital products, ColorCheck Pro helps teams create inclusive designs that are readable by all users, including those with visual impairments. The tool serves web professionals, UX designers, and organizations committed to digital accessibility compliance.
ColorCheck Pro Interface & Screenshots
ColorCheck Pro Official screenshot of the tool interface
What Can ColorCheck Pro Do? Key Features
WCAG 2.1 Compliance Checking
Simultaneously evaluates color combinations against all four WCAG 2.1 contrast standards: AA Normal Text (3:1), AA Large Text (4.5:1), AAA Normal Text (7:1), and AAA Large Text (4.5:1). Provides instant visual feedback with clear pass/fail indicators for each standard.
Real-time Contrast Ratio Calculation
Calculates and displays the precise contrast ratio (like 21:1 shown in the demo) between selected foreground and background colors using the WCAG relative luminance formula. Shows results with two decimal places for precise measurements.
Live Text Preview
Displays sample text in the tested color combination so users can immediately assess real-world readability beyond just numerical ratios. Helps designers make informed visual decisions.
Simple Color Input
Offers straightforward color selection interface for both foreground and background colors, supporting various color formats that designers commonly use in their workflow.
Accessibility-Focused Design
The tool itself follows accessibility best practices, ensuring users with different abilities can effectively use the contrast checking functionality.
Best ColorCheck Pro Use Cases & Applications
Web Design Compliance
Web designers use ColorCheck Pro to verify that all text elements in their designs meet accessibility standards before implementation, preventing costly redesigns and ensuring ADA/WCAG compliance.
Brand Color Adaptation
Marketing teams test their brand colors against various backgrounds to find accessible combinations that maintain brand identity while being inclusive for all users.
Development Quality Assurance
Front-end developers integrate color contrast checks into their QA process, quickly identifying and fixing accessibility issues before product releases.
Educational Tool
Design instructors use the tool to demonstrate accessibility principles to students, showing real-time how color choices affect readability and compliance.
How to Use ColorCheck Pro: Step-by-Step Guide
Select or input your foreground text color using the color picker or by entering a hexadecimal, RGB, or other supported color value.
Choose your background color using the same methods, ensuring you're testing the exact combination that will appear in your design.
View the automatically calculated contrast ratio that appears instantly as you adjust either color.
Check the WCAG compliance indicators which show which accessibility standards your combination meets (AA/AAA for normal/large text).
Assess the live text preview to visually confirm readability, then adjust colors as needed until achieving both compliance and aesthetic goals.
ColorCheck Pro Pros and Cons: Honest Review
Pros
Considerations
Is ColorCheck Pro Worth It? FAQ & Reviews
The tool checks against all WCAG 2.1 color contrast requirements for both AA and AAA compliance levels, for both normal and large text sizes.
No, all color analysis happens locally in your browser. Your color combinations are not sent to or stored on any servers.
While designed for digital interfaces, the WCAG contrast principles can inform print design choices, though print has different lighting considerations.
The tool accepts hex codes, RGB values, and other web-standard color formats for flexible testing.
Calculations follow the precise WCAG 2.1 formulas, providing professional-grade accuracy for accessibility compliance.