Hex #40bbb5 or rgb(64,187,181) in RGB space is the tint of cyan. It has hue angle of 177.07 degrees, value = 73 and saturation = 66. #40bbb5 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 1 drop of blue, 5 drops of cyan.
Nearest safe hex - #33cccc. Below you can see the block with #40bbb5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40bbb5 to the mixer and play with it.