Hex #00685b or rgb(0,104,91) in RGB space is the tint of cyan. It has hue angle of 172.50 degrees, value = 41 and saturation = 100. #00685b can be obtained by mixing 4 colors: 5 drops of blue, 2 drops of cyan, 4 drops of green, 4 drops of black.
Nearest safe hex - #006666. Below you can see the block with #00685b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #00685b to the mixer and play with it.