Hex #20516b or rgb(32,81,107) in RGB space is the tint of bluish cian. It has hue angle of 200.80 degrees, value = 42 and saturation = 70. #20516b can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of blue, 2 drops of green, 1 drop of black.
Nearest safe hex - #336666. Below you can see the block with #20516b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #20516b to the mixer and play with it.