Hex #40ac8f or rgb(64,172,143) in RGB space is the tint of greenish cian. It has hue angle of 163.89 degrees, value = 67 and saturation = 63. #40ac8f can be obtained by mixing 4 colors: 5 drops of cyan, 3 drops of green, 4 drops of white, 4 drops of black.
Nearest safe hex - #339999. Below you can see the block with #40ac8f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40ac8f to the mixer and play with it.