rac·ist
/ˈrāsəst/
adjective
"prejudiced against or antagonistic toward a person or people on the basis of their membership in a particular racial or ethnic group, typically one that is a minority or marginalized."
So... no. It's not racist.
I think with something as intricate as sexual preferences there's no real room for racism but you do need to zoom out and examine your other "preferences" and if you see a pattern