The term 'kind of blue' can be described by the following crossword solutions: TRUE (4 letters), NAVY (4 letters), OPAL (4 letters), NILE (4 letters), AQUA (4 letters), SAD (3 letters), ROYAL (5 letters). TRUE and NAVY are shades of blue, OPAL is a type of gemstone that has a blue hue, Nile is a river in Africa that is known for its blue-green color, aqua is a light shade of blue, SAD is an emotion that is often associated with the color blue, and ROYAL is a deep, dark shade of blue.