Where do you change the background color of forms for Nirvana?
P.S. Getting a user account to post is a big pain, the big Captcha.
What you can have as a user name needs to be more clear you go thru all
the password, captcha, username and it slowly gives hints what is wrong but often it makes no sense.
Form elements don’t have their background color directly configurable, as they are designed to use the same background as the content, with the last 3 accent colors used for the border colors (to create the engraved effect).
If desired, this can be overridden with custom CSS: