Hex #335789 or rgb(51,87,137) in RGB space is the tint of blue. It has hue angle of 214.88 degrees, value = 54 and saturation = 63. #335789 can be obtained by mixing 3 colors: 5 drops of blue, 2 drops of white, 3 drops of black.
Nearest safe hex - #336699. Below you can see the block with #335789 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #335789 to the mixer and play with it.