Antonyms for the phrase "were in keeping" can include words like irregular, conflicting, inappropriate or unsuitable. The phrase "in keeping" indicates a sense of harmony or consistency, which is absent in the antonyms mentioned above. For instance, if we say that the decorations at the party were in keeping with the theme, it indicates a coordinated and consistent approach towards the party decor. However, if the decorations are conflicting or inappropriate, they would be considered antonyms of "in keeping". Therefore, it is important to carefully choose words that are accurate and precise in conveying the intended meaning.