Hex #559ac1 or rgb(85,154,193) in RGB space is the tint of bluish cian. It has hue angle of 201.67 degrees, value = 76 and saturation = 56. #559ac1 can be obtained by mixing 4 colors: 2 drops of red, 5 drops of blue, 5 drops of cyan, 3 drops of white.
Nearest safe hex - #6699cc. Below you can see the block with #559ac1 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559ac1 to the mixer and play with it.