Customize the design of a Lightbox Form?

Does anyone have code to customize the design (colors/fonts) of a lightbox form? 

Please post the URL for the lightbox form on your site. Also describe in detail how you want to style the form.

If your site is not public please set up a site-wide password, if you've not already done so.

Post the password here.

Adding a site-wide password is not a security breach. Please read the documentation at the link provided to understand how it works.

We can then take a look at your issue.