Hex #408f75 or rgb(64,143,117) in RGB space is the tint of greenish cian. It has hue angle of 160.25 degrees, value = 56 and saturation = 55. #408f75 can be obtained by mixing 4 colors: 5 drops of blue, 5 drops of green, 4 drops of white, 2 drops of black.
Nearest safe hex - #339966. Below you can see the block with #408f75 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408f75 to the mixer and play with it.