Hex #40b4d5 or rgb(64,180,213) in RGB space is the tint of bluish cian. It has hue angle of 193.29 degrees, value = 84 and saturation = 70. #40b4d5 can be obtained by mixing 4 colors: 3 drops of blue, 5 drops of cyan, 3 drops of white, 1 drop of black.
Nearest safe hex - #33cccc. Below you can see the block with #40b4d5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b4d5 to the mixer and play with it.