Hex #3998b4 or rgb(57,152,180) in RGB space is the tint of bluish cian. It has hue angle of 193.66 degrees, value = 71 and saturation = 68. #3998b4 can be obtained by mixing 4 colors: 2 drops of magenta, 5 drops of cyan, 1 drop of green, 1 drop of black.
Nearest safe hex - #3399cc. Below you can see the block with #3998b4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #3998b4 to the mixer and play with it.