What's the difference between this and a regular contrast checker?

A regular contrast checker tests only two colors at a time (foreground/background), while this grid checker tests every possible combination in your palette simultaneously. This is crucial for validating entire color systems, design tokens, and brand palettes where you need to ensure all text-background combinations work together.

How many colors can I test at once?

You can test up to 12 colors simultaneously. This limit ensures the grid remains readable and performant. For larger palettes, consider breaking them into logical groups (primary colors, secondary colors, etc.) and test each group separately.

What do the grades (A+, A, B, C, F) mean?

Grades reflect WCAG compliance levels: A+ (7:1+ ratio, AAA normal text), A (4.5:1+ ratio, AA normal text), B (3:1+ ratio, AA large text), C (2:1+ ratio, some visibility), and F (below 2:1, failing). Higher grades ensure better accessibility for users with visual impairments.

Can I use this for print design accessibility?

While designed for digital displays, the WCAG contrast standards also apply to print materials for accessibility. Use the contrast ratios as a baseline, but also consider print-specific factors like paper texture, ink density, and lighting conditions when designing print materials.

Why do some cells show diagonal lines?

Cells on the diagonal represent a color compared with itself (same color as foreground and background). These typically show very low contrast ratios and are marked as failing, as they're not suitable for text-background combinations.

How accurate are the preset color palettes?

Preset palettes are based on established design systems: Material Design from Google, Solarized for developers, and curated high-contrast combinations. These palettes are generally well-tested for accessibility, but you should still verify specific use cases in your context.

Contrast Grid Checker

Generate comprehensive contrast grids showing WCAG compliance for every color combination. Essential accessibility tool for testing entire color palettes, validating design systems, and ensuring inclusive color schemes with visual matrix analysis.

contrast

accessibility

wcag

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Preset Color Palettes

Quick-start with curated color palettes

Input

Enter colors separated by commas. Supports HEX (#RRGGBB) and RGB formats

Colors (max 12)

Examples:

HEX: #FF0000, #00FF00, #0000FF
RGB: rgb(255,0,0), rgb(0,255,0), rgb(0,0,255)
Mixed: #FF0000, rgb(0,255,0), #0000FF

How it works: Generates an N×N grid showing the contrast ratio between every combination of your colors. Each cell shows the WCAG compliance level (AA/AAA) and a letter grade for quick assessment.

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