Hex #007780 or rgb(0,119,128) in RGB space is the tint of cyan. It has hue angle of 184.22 degrees, value = 50 and saturation = 100. #007780 can be obtained by mixing 2 colors: 1 drop of cyan, 1 drop of black.
Nearest safe hex - #006699. Below you can see the block with #007780 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #007780 to the mixer and play with it.