Hex #152d56 or rgb(21,45,86) in RGB space is the tint of blue violet. It has hue angle of 217.85 degrees, value = 34 and saturation = 76. #152d56 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 1 drop of green, 5 drops of black.
Nearest safe hex - #003366. Below you can see the block with #152d56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #152d56 to the mixer and play with it.