Hex #50809b or rgb(80,128,155) in RGB space is the tint of bluish cian. It has hue angle of 201.60 degrees, value = 61 and saturation = 48. #50809b can be obtained by mixing 4 colors: 5 drops of magenta, 2 drops of blue, 5 drops of cyan, 4 drops of green.
Nearest safe hex - #669999. Below you can see the block with #50809b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #50809b to the mixer and play with it.