Wikipedia:Visualizing redirects

There are several options for making links that are redirects have a different color than normal links.

Using a stylesheet
You can add this to your common.css:

Using JavaScript
You can also use a userscript to get the same effect, commonly used ones are: Yet another alternative is this script which you can place in your common.js. It adds a 'redirects" tab which turns all redirects green whenever you want:
 * User:Anomie/linkclassifier
 * User:BrandonXLF/GreenRedirects, a script that turns redirects green
 * User:Nihiltres/assesslinks.js, allows you to see the assessment of every article linked from a given page and turns redirects magenta