The a:link portion basically indicates that the block following, enclosed in the curly brackets, is to be applied to links. Examples might be simplified to improve reading and learning. The a:link portion basically indicates that the block following, enclosed in the curly brackets, is to be applied to links. Visited link- The color of a visited link. Hex codes− A six-digit code representing the amount of red, green, and blue that makes up the color. If you're allready familiar with CSS you can learn all about CSS-links in the section about CSS-links. This page shows how to make HTML button links with onclick and href using the