Hex #20638b or rgb(32,99,139) in RGB space is the tint of bluish cian. It has hue angle of 202.43 degrees, value = 55 and saturation = 77. #20638b can be obtained by mixing 4 colors: 5 drops of blue, 1 drop of green, 1 drop of white, 1 drop of black.
Nearest safe hex - #336699. Below you can see the block with #20638b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #20638b to the mixer and play with it.