I wouldn't deduce that.
Illegal to discriminate on grounds of "race including colour" seems quite obvious that discrimination on grounds of colour is included.
Their is also "ethnic origin".
Or "race including colour".
If discrimination includes colour, then it includes colour.
If you refuse to employ ginger people because they are ginger, then I think that would be equally discriminatory.
Anyway, saying a person's father was an orangutan or ape seems rather similar to me.
Equally rude but one is not allowed.
I am not defending Roseanne; she was stupid and should know better; just pointing out the logic and where we are in this modern world.
It's the same with men and women now.