Multiple forms on a landing page

I am attempting to combine two, possibly three, forms onto one Marketo landing page.  I get that you can have multiple forms on a page, but any customization - even button color - is universal.  A change made to one form, is made to both.  Is there a way, maybe with CSS to call or assign the id's of the various forms, so for example, if I wanted one form submit button to blue and the other to be red?