Hex #718c84 or rgb(113,140,132) in RGB space is the tint of greenish cian. It has hue angle of 162.22 degrees, value = 55 and saturation = 19. #718c84 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 1 drop of blue, 4 drops of cyan.
Nearest safe hex - #669999. Below you can see the block with #718c84 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718c84 to the mixer and play with it.