Hex #409d80 or rgb(64,157,128) in RGB space is the tint of greenish cian. It has hue angle of 161.29 degrees, value = 62 and saturation = 59. #409d80 can be obtained by mixing 4 colors: 4 drops of cyan, 3 drops of green, 4 drops of white, 5 drops of black.
Nearest safe hex - #339999. Below you can see the block with #409d80 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #409d80 to the mixer and play with it.