Bisexual is being sexually attracted to two or more genders. It doesn't necessarily have to be male or female. It can expand to the entire spectrum.

Biromantic is being romantically attracted to two or more genders. 

People can be both or only one of these terms.

Bisexual flag colors: Pink, Purple, Blue

Biromantic flag colors: it's a pink, purple, and blue heart that can match to any sexuality