We've launched another player profile feature to allow further customization on your profile page. When you next access your profile you will see a "Change profile color" button on the bottom left of the banner. You can click on and select one of eight colors from.
This will change nearly all of the links, quest cards, and the mouse over highlights when you are hovering over a favorite games sections of the profile.
Edit: To update the color them within the Disqus comments section of your profile, after you select a color you will need to refresh your profile to see the changes.
It doesn't make a huge difference, but a pretty cool customization option. It doesn't change the color for rank, merits, quests, and the four stats under those though, they stay yellow. It would be nice if they changed too.