I don't know if that person would be right or wrong for that role since I don't know enough about acting in that sense. I envision myself being a terrible caste

I don't know if that person would be right or wrong for that role since I don't know enough about acting in that sense. I envision myself being a terrible caster (but not on this specific matter). It appears you believe skin color isn't compatible with a role, but I don't care about it; I only care about the actor's performance, and if the actor's skin is incompatible with the script we make it compatible. Either we change the skin color, or the script.