Quadsexual

Quadsexual is the attraction to exactly four genders. These can be any four genders, including binary and non-binary genders. For example, a quadsexual person could be attracted to women, demigirls, agender people, and androgyne people. The attraction can be experienced staticly or fluidly.

It falls under the multisexual umbrella.

Flag
The quadsexual flag was created by DeviantArt user Pride-Flags on October 5, 2015. It was based on the original trisexual flag. Pink represents women and feminine genders. Blue represents men and masculine genders. Yellow and purple represent non-binary, neutral, and androgynous, etc. genders.