Hex #40d8b5 or rgb(64,216,181) in RGB space is the tint of greenish cian. It has hue angle of 166.18 degrees, value = 85 and saturation = 70. #40d8b5 can be obtained by mixing 3 colors: 2 drops of yellow, 1 drop of blue, 5 drops of cyan.
Nearest safe hex - #33cccc. Below you can see the block with #40d8b5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40d8b5 to the mixer and play with it.