The antonyms for the phrase "blue plates" may vary depending on the context. Blue plates may refer to a type of dishware that is typically blue in color. Hence, the antonyms for blue plates in this sense may include white plates, black plates, or any other colored plates. However, if blue plates refer to a specific type of meal, then the antonyms may relate to different dishes or cuisines, such as Italian or Mexican food. Alternatively, the opposite of blue plates may refer to the absence of plates or eating utensils altogether, which could be considered more minimalist or rustic. Ultimately, the antonyms for blue plates may be subjective and depend on the individual's interpretation.