Hex #175674 or rgb(23,86,116) in RGB space is the tint of bluish cian. It has hue angle of 199.35 degrees, value = 45 and saturation = 80. #175674 can be obtained by mixing 4 colors: 3 drops of blue, 2 drops of cyan, 1 drop of white, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #175674 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #175674 to the mixer and play with it.