Hex #40b6bf or rgb(64,182,191) in RGB space is the tint of cyan. It has hue angle of 184.25 degrees, value = 75 and saturation = 66. #40b6bf can be obtained by mixing 3 colors: 2 drops of cyan, 1 drop of white, 1 drop of black.
Nearest safe hex - #33cccc. Below you can see the block with #40b6bf color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b6bf to the mixer and play with it.