Hex #408579 or rgb(64,133,121) in RGB space is the tint of greenish cian. It has hue angle of 169.57 degrees, value = 52 and saturation = 52. #408579 can be obtained by mixing 4 colors: 4 drops of blue, 3 drops of green, 3 drops of white, 2 drops of black.
Nearest safe hex - #339966. Below you can see the block with #408579 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408579 to the mixer and play with it.