Hex #407f72 or rgb(64,127,114) in RGB space is the tint of greenish cian. It has hue angle of 167.62 degrees, value = 50 and saturation = 50. #407f72 can be obtained by mixing 4 colors: 3 drops of magenta, 2 drops of blue, 2 drops of cyan, 5 drops of green.
Nearest safe hex - #336666. Below you can see the block with #407f72 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407f72 to the mixer and play with it.