Hex #40c39c or rgb(64,195,156) in RGB space is the tint of greenish cian. It has hue angle of 162.14 degrees, value = 76 and saturation = 67. #40c39c can be obtained by mixing 4 colors: 2 drops of blue, 3 drops of cyan, 4 drops of green, 3 drops of white.
Nearest safe hex - #33cc99. Below you can see the block with #40c39c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40c39c to the mixer and play with it.