Hex #40b2bf or rgb(64,178,191) in RGB space is the tint of cyan. It has hue angle of 186.14 degrees, value = 75 and saturation = 66. #40b2bf can be obtained by mixing 2 colors: 1 drop of red, 3 drops of cyan.
Nearest safe hex - #3399cc. Below you can see the block with #40b2bf color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b2bf to the mixer and play with it.