Hex #175d7c or rgb(23,93,124) in RGB space is the tint of bluish cian. It has hue angle of 198.42 degrees, value = 49 and saturation = 81. #175d7c can be obtained by mixing 4 colors: 1 drop of magenta, 1 drop of blue, 4 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #175d7c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #175d7c to the mixer and play with it.