Hex #17657c or rgb(23,101,124) in RGB space is the tint of bluish cian. It has hue angle of 193.66 degrees, value = 49 and saturation = 81. #17657c can be obtained by mixing 4 colors: 2 drops of blue, 3 drops of cyan, 1 drop of white, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #17657c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #17657c to the mixer and play with it.