Hex #175d6c or rgb(23,93,108) in RGB space is the tint of bluish cian. It has hue angle of 190.59 degrees, value = 42 and saturation = 79. #175d6c can be obtained by mixing 4 colors: 1 drop of red, 1 drop of blue, 4 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #175d6c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #175d6c to the mixer and play with it.