Het = Heterozygous in short meaning 1 gene
Homozygous in short means having 2 genes (genes comes in pairs of 2)
So het red axanthic has 1 gene and the red axanthic has both genes. Pastel, Lesser, Cinny, ect. are all heterozygous aka hets. all morphs are heterozygous or homozygous, doesn't matter if their visual or not, dom, co-dom, or recessive.
So when you bred your BB did you also get non-BB animals in the same clutch?