Hex #559495 or rgb(85,148,149) in RGB space is the tint of cyan. It has hue angle of 180.94 degrees, value = 58 and saturation = 43. #559495 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 5 drops of blue, 3 drops of cyan.
Nearest safe hex - #669999. Below you can see the block with #559495 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559495 to the mixer and play with it.