[Amenadiel]

Originally Posted by dream.twin

hi, I am very much new to the vbulletin forums; I newly bought a vbulletin setup and now I want to add rank images to my site, instead of casual letters like "admin, moderator, member,.."

You could define different usergroups, each one with its own image, and configure promotions to change user's primary usergroup to the one that fits their post count.

Originally Posted by dream.twin

2. How to change the colors of the moderator,...

eg: in my site moderator color is green, I want to change it to blue.

I will be glad if someone can help me out here.

when editing an usergroup, you can set the before and after HTML markup. In your case it would be

before: <span style="color: blue;">
after: </span>