Hex #5589a1 or rgb(85,137,161) in RGB space is the tint of bluish cian. It has hue angle of 198.95 degrees, value = 63 and saturation = 47. #5589a1 can be obtained by mixing 4 colors: 4 drops of blue, 1 drop of green, 3 drops of white, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #5589a1 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5589a1 to the mixer and play with it.