to change the colour of the scrollbar just change the html colour coding

Thats accually not HTML at all its CSS or Cascading Style Sheets.
CSS Allows the web builder to add specifications to thier HTML Document.

Go here to find out more about it: W3C Schools

You can actually define the background color for the scrollbar in your marquee tag.
Here is an example.
<marquee bgcolor=000000> Hello </marquee> (black background)
Its simpler than using styles.

i made a topic about these before, about a css scrollbar generator (makes it easier than playing around with the code yourself):

http://www.trap17.com/forums/index.php?showtopic=710

That's the background of a marquee, not the scrollbars.

Oh, I thought you guys were talking about text scrolling bars. Hence, Marquee. In that case, here is a code using CSS... it's the simplest way. Insert this into the head of your website, and fill in the colors appropriately for your website:

<style type="text/css">
<!--
BODY{scrollbar-3d-light-color:000000;
scrollbar-arrow-color:000000;
scrollbar-base-color:000000;
scrollbar-dark-shadow-color:000000;
scrollbar-face-color:000000;
scrollbar-highlight-color:000000;
scrollbar-shadow-color:000000;}
-->
</style>

i was told that u can put that into your html code aswell... but i never tired using it.. i jsut went with CSS

Be wary of using it, though. I'm not entirely sure that changing the scrollbar is a W3C standard, as it put up errors when I tried to validate CSS that used it. While I think it looks nice done properly, just be careful. Also, if it is valid, could someone give me a link to the W3C page that says so? I can't seem to find it in their list of valid CSS tags.