Hex #40a495 or rgb(64,164,149) in RGB space is the tint of greenish cian. It has hue angle of 171.00 degrees, value = 64 and saturation = 61. #40a495 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 4 drops of cyan, 2 drops of green.
Nearest safe hex - #339999. Below you can see the block with #40a495 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40a495 to the mixer and play with it.