Hex #40c4aa or rgb(64,196,170) in RGB space is the tint of greenish cian. It has hue angle of 168.18 degrees, value = 77 and saturation = 67. #40c4aa can be obtained by mixing 3 colors: 1 drop of yellow, 1 drop of blue, 2 drops of cyan.
Nearest safe hex - #33cc99. Below you can see the block with #40c4aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40c4aa to the mixer and play with it.