Contrast Tools for Accessibility and Design

Access 22 online tools to check color contrast, verify WCAG compliance, and optimize visual accessibility. Secure server-side processing with automatic file deletion.

Our contrast tools help you ensure visual accessibility by calculating color ratios, verifying WCAG compliance, and adjusting color pairs for better readability. Use these tools to validate RGB, HEX, and HSL values directly in your browser, with all processing handled securely on our servers.

22 Tools

Security & Validation
Accessibility Checker
Detect common WCAG 2.1 accessibility issues in HTML, fetched pages, or design images and return fix-ready guidance
Design & Color
Accessibility Heatmap Generator
Generate a contrast-focused accessibility heatmap from a UI screenshot or HTML input and suggest stronger patch colors
Design & Color
Accessible Color Palette Contrast Checker
Audit every color pair in a palette against WCAG 2.1 AA and AAA contrast thresholds and suggest adjustments
Design & Color
Color Accessibility Checker
Check color contrast ratios for WCAG compliance
Design & Color
Color Contrast Checker
Check color contrast ratio and WCAG compliance for accessibility
Design & Color
Color Shade Generator
Generate darker variations of a color by adding black, creating rich shades for depth and contrast in design
Design & Color
Color Split Complement
Generate split complementary color schemes with harmonious contrast using base color and two adjacent colors to complement
Design & Color
Color Vision Accessibility Checker
Measure WCAG contrast, simulate major color-vision deficiencies, and optionally flag low-contrast regions in a UI screenshot
Design & Color
CSS Filter Generator
Generate CSS filter properties
Design & Color
CLAHE Histogram Equalization
Apply Contrast Limited Adaptive Histogram Equalization for local contrast enhancement
Design & Color
Image Color Burn Blend
Apply color burn blend mode between two images for dramatic darkening and intense color effects
Design & Color
Image Color Palette Extractor
Extract dominant colors from an image, export code-ready tokens, and check contrast ratios
Design & Color
Image Contrast Adjustment
Adjust image contrast levels with precise control for enhanced image clarity
Design & Color
Image Cross-Process Effect
Apply cross-process effect that simulates film processing with unique color curves and contrast enhancement
Design & Color
Image Exposure Adjustment
Adjust image exposure to simulate camera exposure compensation for brightness and contrast control
Design & Color
Image Hard Light Blend
Apply hard light blend mode between two images for strong, intense contrast and vivid effects
Design & Color
Image Linear Transformation
Apply linear transformation (a * input + b) to adjust image levels, brightness, and contrast
Design & Color
Image Normalise
Normalise image histogram to enhance contrast by stretching the intensity range (British spelling)
Design & Color
Image Normalize
Normalize image histogram to enhance contrast by stretching the intensity range
Design & Color
Image Overlay Blend
Apply overlay blend mode between two images to enhance contrast and create dramatic effects
Design & Color
Image Soft Light Blend
Apply soft light blend mode between two images for gentle, subtle contrast enhancements
Design & Color
Neon Color Generator
Generate vibrant, glowing neon colors with high saturation and brightness, creating eye-catching electric light effects perfect for digital displays and modern design

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FAQ

How do these tools help with WCAG compliance?

These tools calculate the contrast ratio between foreground and background colors, helping you meet AA or AAA standards for text and user interface components as defined by accessibility guidelines.

Is my color data or uploaded content stored?

No. Text inputs are not stored on our systems, and any uploaded files are automatically deleted from our servers after 6 hours.

Do I need to install any software to use these contrast checkers?

No software installation is required. You operate the tools through your browser interface, while the actual processing tasks are performed on Elysia Tools servers.