Staff Cards
There's a link for each image where you just need to change the Minecraft Username on it.
Check the Example below:
The " Gandalf " above is the Minecraft Username for some specified card. You can simply change there whatever Minecraft Username you'd like =)
Complete Card Example:
You can change the Cards Colors using Bootstrap 4 installed on the website.
For the green(default) one is named as "success".
Available colours: https://getbootstrap.com/docs/4.0/components/card/#border