Color Accessibility Studio
Ensure your designs work for everyone
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Understanding Color Vision Deficiencies
Protanopia (Red-blind)
Affects approximately 1% of males. People with protanopia have difficulty distinguishing between red and green colors, as the red cones are missing or non-functional.
Deuteranopia (Green-blind)
The most common type of color blindness, affecting about 6% of males. People with deuteranopia have difficulty distinguishing between red and green, as the green cones are missing or non-functional.
Tritanopia (Blue-blind)
A very rare condition affecting less than 1% of people. People with tritanopia have difficulty distinguishing between blue and green, and between yellow and violet.
Monochromacy (Complete Color Blindness)
An extremely rare condition where people see only in shades of gray. This occurs when two or all three types of cone cells are non-functional.
Contrast Results
Text Preview
This is an example of normal text size. The quick brown fox jumps over the lazy dog. This should meet a 4.5:1 contrast ratio for WCAG AA compliance.
Understanding Contrast Ratios
What is Contrast Ratio?
Contrast ratio is a measure of the difference in luminance between two colors. It’s calculated as (L1 + 0.05) / (L2 + 0.05), where L1 is the relative luminance of the lighter color and L2 is the relative luminance of the darker color.
WCAG Guidelines
The Web Content Accessibility Guidelines (WCAG) provide specific contrast ratio requirements to ensure text is readable by people with moderately low vision. AA is the minimum standard, while AAA provides enhanced accessibility.
Designing for Accessibility
When designing with color, ensure sufficient contrast between text and background. Avoid using color alone to convey information, and test your designs with different types of color vision deficiencies.
Common Pitfalls
Common accessibility mistakes include using light gray text on white backgrounds, relying solely on color to indicate status, and using color combinations that are difficult for color-blind users to distinguish.
