Hex #3b647d or rgb(59,100,125) in RGB space is the tint of blue. It has hue angle of 202.73 degrees, value = 49 and saturation = 53. #3b647d can be obtained by mixing 4 colors: 5 drops of blue, 1 drop of green, 3 drops of white, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #3b647d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #3b647d to the mixer and play with it.