Hex #40596b or rgb(64,89,107) in RGB space is the tint of blue. It has hue angle of 205.12 degrees, value = 42 and saturation = 40. #40596b can be obtained by mixing 4 colors: 3 drops of magenta, 3 drops of cyan, 2 drops of green, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #40596b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40596b to the mixer and play with it.