Hex #778c8e or rgb(119,140,142) in RGB space is the tint of cyan. It has hue angle of 185.22 degrees, value = 56 and saturation = 16. #778c8e can be obtained by mixing 4 colors: 2 drops of yellow, 5 drops of blue, 5 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #778c8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #778c8e to the mixer and play with it.