Fast Answer: Checking Accessibility Color Contrast
Under WCAG 2.2 accessibility standards, digital content must maintain sufficient visual contrast between text and background colors to ensure legibility for users with visual impairments or color blindness:
- WCAG Level AA (Normal Text): Minimum contrast ratio of 4.5 : 1.
- WCAG Level AA (Large Text >18pt): Minimum contrast ratio of 3.0 : 1.
- WCAG Level AAA (Enhanced): Minimum contrast ratio of 7.0 : 1.
Use the Color Tools & Contrast Checker on Tools24Now to calculate mathematical contrast ratios and convert between HEX, RGB, and HSL instantly.
Color Space Formulas Explained
- HEX (
#4F46E5): Base-16 hexadecimal notation standard in CSS web design. - RGB (
rgb(79, 70, 229)): Additive color model representing red, green, and blue intensities from 0 to 255. - HSL (
hsl(243, 75%, 59%)): Hue, Saturation, and Lightness—the most intuitive model for programmatic color palette generation.
Step-by-Step Usage Guide
- Open Color Tools.
- Enter your foreground text color and background color in any format (HEX, RGB, or HSL).
- Inspect the live contrast score and compliance badges (Pass/Fail for AA and AAA).
- Copy the converted code snippets directly into your CSS or Tailwind stylesheet.