How to post code (html xml) on blogs (wordpress,blogger)

Well one way to post html or xml into blogs is to replace or encode the start and closing tags with html code so that they actually displayed in the browser rather than being taken by browser as actual html of the page
this webiste can help you to encode your html

http://centricle.com/tools/html-entities/

it wont color it but you can color it using coloring tool in blogger's blog editor

Thanks