Per The WebAIM Million report, low contrast text represents 79.1% of all errors on the 1M homepages they analyzed via automated testing. People with low vision often struggle with text that blends into its background, especially if they also have a color vision deficiency. And as people like you and me age, this becomes especially important. Ensuring a minimum contrast ratio between text and background makes it easier to read, even for those who see limited or no color.