Hex #718d93 or rgb(113,141,147) in RGB space is the tint of bluish cian. It has hue angle of 190.59 degrees, value = 58 and saturation = 23. #718d93 can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of blue, 5 drops of green, 5 drops of white.
Nearest safe hex - #669999. Below you can see the block with #718d93 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718d93 to the mixer and play with it.