Hex #40a3b2 or rgb(64,163,178) in RGB space is the tint of bluish cian. It has hue angle of 187.89 degrees, value = 70 and saturation = 64. #40a3b2 can be obtained by mixing 4 colors: 5 drops of blue, 2 drops of cyan, 2 drops of green, 3 drops of white.
Nearest safe hex - #339999. Below you can see the block with #40a3b2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40a3b2 to the mixer and play with it.