Hex #3989b4 or rgb(57,137,180) in RGB space is the tint of bluish cian. It has hue angle of 200.98 degrees, value = 71 and saturation = 68. #3989b4 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of magenta, 4 drops of blue, 3 drops of cyan.
Nearest safe hex - #3399cc. Below you can see the block with #3989b4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #3989b4 to the mixer and play with it.