Anonymous said: Do the people of a fictional race always have to physically resemble the people of the real world race of which its based? For example, in my story are a race of people whose culture I based of of Mexico, they have the same skin tones Mexican people however their eyes can be any color from blue to red. Is this harmful?
Pragmatically speaking, the people of a fictional have to be recognizable as the people they represent, otherwise their design will be lost on ignorant ears.
Beyond that, appearance generally should be something to be careful to keep largely in tact because if you arbitrarily change the appearance of the people you represent this choice may be interpreted as a harmful suggestion that those people they represent should look another way.
HOWEVER, since you are mentioning non natural eye colors are a possibility in this specific example, like red, this does not appear to be that sort of suggestion, and just that the gamut of this race is wider.
Now, if you mean “Mexicans” as in a post-Spain society as opposed to Aztecs (or other Mesoamerican indigenous groups), it should definitely be noted that Mexicans can have blue eyes and blond hair or black hair and blue eyes or be really dark or pasty white or something in between. The mixture of indigenous and Spanish ancestry will produce practically anybody within the gamut.