Hex #558871 or rgb(85,136,113) in RGB space is the tint of teal. It has hue angle of 152.94 degrees, value = 53 and saturation = 38. #558871 can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of cyan, 2 drops of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #558871 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558871 to the mixer and play with it.