Hex #40b29f or rgb(64,178,159) in RGB space is the tint of greenish cian. It has hue angle of 170.00 degrees, value = 70 and saturation = 64. #40b29f can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 5 drops of cyan, 1 drop of black.
Nearest safe hex - #339999. Below you can see the block with #40b29f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b29f to the mixer and play with it.