call a page load event from another code behind

Hi,
I really dont know if this que make sense because i have one webpage say Main.aspx, which has a method named SetColor() inside its page load event that too in a notIsPostBack event. My requirement is , to call this page's method (Page_Load of Main.aspx) from another c# class called SomeClass.cs.
Any suggestions ?

Thanks,
Lokesh