Hex #336889 or rgb(51,104,137) in RGB space is the tint of blue. It has hue angle of 203.02 degrees, value = 54 and saturation = 63. #336889 can be obtained by mixing 2 colors: 1 drop of yellow, 4 drops of blue.
Nearest safe hex - #336699. Below you can see the block with #336889 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #336889 to the mixer and play with it.