YOU SAID:
My favorite color is blue, the color of the sky and the sea.
INTO JAPANESE
私の好きな色はブルー、空と海の色です。
BACK INTO ENGLISH
My favorite color is the color of blue sky and sea.
INTO JAPANESE
私の好きな色は、青い空と海の色です。
BACK INTO ENGLISH
My favorite color is the color of blue sky and sea.
Come on, you can do better than that.