The word "blued" can refer to the process of applying a blue-black finish to metal or making something blue in color. Synonyms for this word could include "dyed blue," "stained blue," "colored blue," or "tinted blue." Other phrases that could be used in place of "blued" might include "finished in blue," "covered in a blue hue," or "made blue with pigment." Depending on the context, synonyms such as "azure," "cerulean," "navy," or "sapphire" might also be appropriate alternatives for describing the color blue.