Disclaimer: I thought of posting this text as a comment, but it would be too big.
Stefan is right, the blue color means you visited that link.
Just to add some technical/sorcery stuff:
I checked the main site stylesheet (
css) and found the following entries:
a tag refers to a hyperlink, that is, a word, group of words, or image that you can click on to jump to a new document or a new section within the current document.1
The word right after the
a tag and the
: symbol means a pseudo-class, that is, a reference to add special effects to the tag2. In our example,
a:visited means that a visited hyperlink will be set according to the key/value entries in the group.
The colors are defined using a hexadecimal notation for the combination of red, green, and blue color values (RGB)3. We can check what colors those numbers represent:
I hope I picked up the right colors, the
css file is huge. But the idea is the same.
- HTML Hyperlinks
- HTML Colors