Hex #40b9ce or rgb(64,185,206) in RGB space is the tint of bluish cian. It has hue angle of 188.87 degrees, value = 81 and saturation = 69. #40b9ce can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of blue, 5 drops of cyan, 2 drops of white.
Nearest safe hex - #33cccc. Below you can see the block with #40b9ce color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40b9ce to the mixer and play with it.