^^^
Just so.
“Het” is a slang term in the hobby that is derived from the scientifically legitimate term “heterozygous”. The heterozygous condition is not exclusive to recessives, as it applies to any situation where two non-alike alleles are present. So, as Kristin pointed out, Pastels and all other single expression inc-dom morphs are heterozygous. This point is perfectly illustrated by the morph we call Het RedAxanthic which is the heterozygous form of RedAxanthic