Basic Trope: A relationship involving two people of different races recieves a negative reaction from those around them
Straight: Society doesn't like that Alice, who is white, has gotten together with Bob, who is black.
Exaggerated: Society doesn't like that Alice and Bob are together because she has blue eyes and he has brown eyes.
Downplayed: Society doesn't like that Alice, who is white, has gotten together with Bob, who is black. They eventually relent once Bob is revealed to be not too black.
Alice and Bob come from cultures that were at war just a few years ago.
Bob's race has a poor reputation. Whether this reputation is well-earned may or may not be addressed in the story, but, as far as Alice's friends and family are concerned, they view themselves as trying to save Alice from marrying a monster.
Inverted: Society doesn't like that Alice and Bob are of the same race.
People don't appreciate that Alice and Bob are together. When an outsider, who believes this trope is in effect demands to know why it's a problem, the rest of the people point out that Alice and Bob are jerks who are even bigger jerks when they're together.
At first, the reason why Alice's family and friends frown on her and Bob's relationship appears to be because of their different races. In truth, Alice's family and friends could care less about race. They do care that Bob is in a lower social class than Alice, though.
Double Subverted: ...Because he's the same race as Alice.
Parodied: Society doesn't like Bob and Alice together, though it's because they're from different cities than that they're of different races.
Zig Zagged: People don't like Alice (white) and Bob (black) getting together, but when Charlie (black) and Danielle (white) get together, no one has a problem with it. However, Charlie's skin is pale enough that he can pass for white, while Bob's isn't. Once Charlie's ancestry is revealed, no one seems to mind that Danielle is dating a black man, though.
Averted: Race is not an obstacle when Alice and Bob get together.
The story takes place in the USA in the 1890s and is being historically accurate.
The story takes place during any period of time when racism was common, and is being historically accurate.
Lampshaded: "And here I thought we were beyond such silly things like disliking mixed race couples."