My children have 100% Jamaican parents but I am German Jamaican & Irish/Welsh & dad is black Jamaican. My 2 oldest dad is black Jamaican & Cuban, my 2 youngest their dad is black Jamaican & Chinese. We are very multiracial in the Caribbean!
I don't know if they are considered biracial, bur I am half Italian half German and my husband is half Irish half 1/4 indian and 1/4 German. I would just say our children are a heinz 57.