Hex #157580 or rgb(21,117,128) in RGB space is the tint of cyan. It has hue angle of 186.17 degrees, value = 50 and saturation = 84. #157580 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of blue, 4 drops of cyan, 4 drops of black.
Nearest safe hex - #006699. Below you can see the block with #157580 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #157580 to the mixer and play with it.