Hex #55888e or rgb(85,136,142) in RGB space is the tint of cyan. It has hue angle of 186.32 degrees, value = 56 and saturation = 40. #55888e can be obtained by mixing 4 colors: 1 drop of red, 3 drops of cyan, 2 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #55888e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55888e to the mixer and play with it.