Hex #405b75 or rgb(64,91,117) in RGB space is the tint of blue. It has hue angle of 209.43 degrees, value = 46 and saturation = 45. #405b75 can be obtained by mixing 4 colors: 1 drop of magenta, 2 drops of cyan, 1 drop of white, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #405b75 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405b75 to the mixer and play with it.