Hex #40a89c or rgb(64,168,156) in RGB space is the tint of cyan. It has hue angle of 173.08 degrees, value = 66 and saturation = 62. #40a89c can be obtained by mixing 3 colors: 3 drops of yellow, 5 drops of blue, 4 drops of cyan.
Nearest safe hex - #339999. Below you can see the block with #40a89c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40a89c to the mixer and play with it.