Hex #40bfd5 or rgb(64,191,213) in RGB space is the tint of bluish cian. It has hue angle of 188.86 degrees, value = 84 and saturation = 70. #40bfd5 can be obtained by mixing 4 colors: 1 drop of blue, 4 drops of cyan, 2 drops of white, 1 drop of black.
Nearest safe hex - #33cccc. Below you can see the block with #40bfd5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40bfd5 to the mixer and play with it.