This design sucks

Here a 3 color vision plates with the same kind of design. I think these are the stupidest plates ever. I supposed that it’s supposed to be like ”color blind people only see X” in the image while people with normal color vision see something else. But atleast for me both of the answers in these plates are equally clear, so how are people with normal color vision (like me) supposed to know which one is the ”right answer”?