Hex #40688b or rgb(64,104,139) in RGB space is the tint of blue. It has hue angle of 208.00 degrees, value = 55 and saturation = 54. #40688b can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 5 drops of blue, 1 drop of cyan.
Nearest safe hex - #336699. Below you can see the block with #40688b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40688b to the mixer and play with it.