CSS Color Contrast: The WCAG Rules Every Developer Should Know

Color contrast is one of the most commonly overlooked accessibility requirements in web development — and one of the easiest to fail accidentally. You pick a beautiful grey text on a white background, it looks fine on your calibrated monitor, and then someone with low vision or a washed-out phone screen can't read it at all. This post covers how contrast ratios work, what WCAG requires, and how to check your colors before they ship. What Is a Contrast Ratio? The contrast ratio between two colors