Quick Tip: Contrast of Link/Button States
Links and buttons must provide sufficient contrast to their background color, even when presented in their various states, such as when hovered with a mouses or focused via keyboard navigation. Links and buttons are often styled to change color in these states. Because hover and focus states typically indicates the exact moment that the element is being read, it is best to change the colors to increase the contrast in theses states rather than decrease the contrast.
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