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.