Web Accessibility Design Principles | 3 Color Contrast Checkers (Chrome & Firefox plugin)
It is not easy to build a web-accessible website from the ground up, so having good gadgets can help us a lot. In the Web Accessibility Principle, the criterion of color contrast is related to not only the background color and text color, but also the text size. For example, when the text size is larger, the contrast is higher. For detailed explanation, please refer to this article on w3.org.