Hex #157c79 or rgb(21,124,121) in RGB space is the tint of cyan. It has hue angle of 178.25 degrees, value = 49 and saturation = 83. #157c79 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 5 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #157c79 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #157c79 to the mixer and play with it.