For color:
[color=COLORNAME OR #HEX NUMBER] text [/color]

For Size:
[size=#] text [/size]

[img]http://images.marapets.com/avatars/invisible.gif[/img]
[img]Your Siggy URL HERE[/url]

You can find most of mara tricks here:
http://marahistory.webs.com/tricks.htm